Match spaces that appear before or in-between tabs (#58)

* Add support for unicode whitespace characters

* Add section to readme on supported whitespace characters

* Add file with samples of various whitespace characters

* Update README.md

* Update README.md

* Match spaces that appear before or in-between tabs

This patch adds a option to enable matching of space characters that
appear before or in-between tabs. Removing such characters can be as
important as removing trailing white-space. This option is currently
disabled by default.

Author: matt1003

README.md

@@ -176,7 +176,6 @@ Whitespace highlighting is enabled by default, with a highlight color of red.
     let g:better_whitespace_verbosity=1
     ```
 
-
 ## Supported Whitespace Characters
 Due to the fact that the built-in whitespace character class for patterns (`\s`)
 only matches against tabs and spaces, this plugin defines its own list of

whitespace_examples.txt

@@ -3,8 +3,8 @@ U+0020	SPACE:
 U+00A0	NO-BREAK SPACE: 
 U+1680	OGHAM SPACE MARK: 
 U+180E	MONGOLIAN VOWEL SEPARATOR:᠎
-U+2000	EN QUAD: 
-U+2001	EM QUAD: 
+U+2000	EN QUAD: 
+U+2001	EM QUAD: 
 U+2002	EN SPACE: 
 U+2003	EM SPACE: 
 U+2004	THREE-PER-EM SPACE: