Add Golang part, (#39)

* working on Golang part, add text to misc.md, disadvantages.md and conclusion.md soon, request: check grammar in files that I added.

* fixed errors from mdlint output

* Edits and grammar

* edits

* Update intro.md

* Update advantages.md

* Update advantages.md

* added more Golang things, edited intro.md, added stuff to disadvantages.md, misc.md (with code examples) and conclusion.md

* changed grammar things, added few words to intro.md

* Update README.md

Author: jonasgeiler

book/languages/golang/README.md

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+# Hi there
+
+> This chapter was made by Skayo.
+
+Welcome to the Golang part!
+I hope you'll enjoy this chapter.

book/languages/golang/advantages.md

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+# Advantages of Golang
+
+## Here are some advantages of using it
+
+* **Go compiles directly into machine code**. The compilation is fast, **cross-platform compatible** and it creates only
+  one executable file without dependencies.
+
+* It is **safe**, as it uses strong and static typing. Also, garbage would be collected automatically and
+  you can make really reliable software using Go.
+
+* It supports some kinds of **object-oriented programming (OOP)** and interfaces.
+
+* You can attach functions to any type. That's real flexibility.
+
+* Also, Golang supports functional programming features like **anonymous functions**, **closueres** and **first-class functions**.
+
+* Common utilities like **HTTP fetching**, **JSON  parsing** and **encryption** are included by default in Go in the form of standard libraries.
+  
+* Go has great built-in command-line tools (ex. **auto-formatting your code**, **test coverage reporting**, **refactoring tools**).

book/languages/golang/conclusion.md

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+# Conclusion
+
+Some say that now is just a hype for Golang.
+Some say that Golang is hipster programming language.
+But I'll say something more.
+
++I think the Golang is usefully language, specially for backend applications.
++It's really fast, and for some, syntax similar to C would be an advantageous point.
+
+## Sources
+
+* [**Wikipedia**](https://en.wikipedia.org/wiki/Go_(programming_language))
+
+* [**Quora**](https://www.quora.com/What-are-the-advantages-and-disadvantages-of-Golang)
+
+* [**Awesome Go**](https://github.com/avelino/awesome-go#database)
+
+## Regarding authors
+
+This chapter was made by [Skayo](https://github.com/Skayo) with grammar corrections made by [Gadila Shashank Reddy](https://github.com/gadilashashank).

book/languages/golang/disadvantages.md

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+# Disadvantages of Golang
+
+## Some `bad` stuff about Golang
+
+* *No support for generics*, but Golang team is *still* thinking about adding it.
+
+* **Smaller amount of packages** compared to Node.js or Ruby.
+
+* *No support* for overloading a function.
+
+* Some may like, some may hate, Golang is an **imperative** type of language.

book/languages/golang/history.md

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+# History
+
+## Far, far away in a company called **Google**... was created the Golang programming language
+
+It was announced in **November 2009**,
+but its 1.0 version was released in **March 2012**.
+
+It's originally designed by **Robert Griesemer**, **Rob Pike** and **Ken Thompson**.
+They were **Google** engineers and Go was an experiment.
+
+They wanted to make programming language:
+
+* that **doesn't require** IDE but with support for them,
+
+* that **supports** networking and multitasking,
+
+* that **is productive and readable**, without excessive boilerplate (like Ruby or Python has),
+
+* that **is statically typed** and **scalable** to large systems (ex. Java or C++).
+
+## Golang now
+
+Now Golang is used in some of **Google** production systems, but it's well-recognized language on whole Earth.

book/languages/golang/intro.md

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+# Introduction
+
+## Inception
+
+**Golang** (GO) is another high-level programming language.
+It's usually used to make **backend stuff**.
+`Backend stuff`, I mean, for example rest API for your website, CMS for your website or chatbot.
+But, as it always is, the community made a lot of frameworks based on Golang,
+for example, A framework to use Golang as a frontend language (ex. **Buffalo**).
+
+Also, you can create Desktop UI in Golang.
+Amount of frameworks for Golang is not such a big deal as it was for JavaScript,
+but it's nice to have something more than just pure language.
+
+## More engineering stuff here
+
+Golang is a statically typed compiled language in the tradition of C, but with some more features.
+Overall, **Go's syntax is similar to C's syntax**.
+
+That features as I said are for example:
+
+* **garbage collection**
+
+* **structural typing**
+
+* **concurrent programming**
+
+Tools for Golang, compiler and source code of Golang are free and open-source.
+
+If you want to see the full list of Golang libraries, packages, and stuff, you can see it [here](https://github.com/avelino/awesome-go#database).
+
+> The file extension for Golang is **.go**

book/languages/golang/misc.md

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+# Some interesting things about Golang
+
+* **Twitch.tv**, an IRC based chat was migrated from Python to Golang
+
+* **SoundCloud** says they use Golang for ``dozens of systems``
+
+* **Netflix** use it for their server architecture
+
+* **Docker** uses Golang for a set of tools that deploys Linux containers
+
+* **Uber** has their geo data and location components built on Golang
+
+## Example of code written in Go compared to other languages
+
+### Golang
+
+```Golang
+package main
+
+import "fmt"
+
+func main() {
+    fmt.Println("Hello, World")
+}
+```
+
+### Python
+
+```Python
+print "Hello world!"
+```
+
+### Ruby
+
+```Ruby
+puts "Hello world!"
+```
+
+Just a simple example of `Hello World` type of code.