fix: README update and some slightly fix

Author: haorenW1025

README.md

@@ -1,3 +1,4 @@
+[![Build Status](https://travis-ci.com/haorenW1025/completion-nvim.svg?branch=master)](https://travis-ci.com/haorenW1025/completion-nvim)
 [![Gitter](https://badges.gitter.im/completion-nvim/community.svg)](https://gitter.im/completion-nvim/community?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
 # completion-nvim
 
@@ -147,6 +148,18 @@ let g:completion_enable_auto_hover = 0
 let g:completion_enable_auto_signature = 0
 ```
 
+
+
+### Enable/Disable fuzzy match
+- By default fuzzy match is disable, you can enable it by
+
+```vim
+let g:completion_enable_fuzzy_match = 1
+```
+
+*NOTE* Fuzzy match highly dependent on what language server you're using. It might not
+work as you expect on some language server.
+
 ### Max Items for completion
 
 - You can set a number limit for the maximum completion items. For example, if you

lua/completion/util.lua

@@ -75,7 +75,7 @@ function M.text_document_completion_list_to_complete_items(result, prefix, score
       }
       local kind = protocol.CompletionItemKind[completion_item.kind]
       local priority = vim.g.completion_items_priority[kind] or 1
-      if vim.g.completion_fuzzy_match == 1 then
+      if vim.g.completion_enable_fuzzy_match == 1 then
         local score = score_func(prefix, word)
         if score <= 1 then
           table.insert(matches, {

plugin/completion.vim

@@ -74,7 +74,7 @@ if ! exists('g:completion_max_items')
 endif
 
 if ! exists('g:completion_fuzzy_match')
-    let g:completion_fuzzy_match = 1
+    let g:completion_enable_fuzzy_match = 0
 endif
 
 if ! exists('g:completion_chain_complete_list')