Archor a few paths to the root of the source tree. Minor re-ordering.

Author: wsanchez

.gitignore

@@ -1,9 +1,6 @@
-docs/_build
+/docs/_build
 tmp.py
-htmlcov/
-.coverage.*
 *.py[cod]
-.mypy_cache
 
 # emacs
 *~
@@ -32,11 +29,16 @@ lib64
 # Installer logs
 pip-log.txt
 
-# Unit test / coverage reports
-.coverage
-.tox/
+# Testing
+/.tox/
 nosetests.xml
 
+# Coverage
+/.coverage
+/.coverage.*
+/htmlcov/
+/.mypy_cache
+
 # Translations
 *.mo