Implemented a MarkDown mode for StripTrailingSpaces

In MarkDown mode lines are allowed to end with up to two spaces, this
allows for the definition of hard linebreaks by placing a double-space
at the end of a line.
Updated StripTrailingSpaces to use augroup
Enabled a new MarkDown-mode for StripTrailingSpaces
Updated project documentation
Update StripTrailingSpaces to include a Source Code mode
Updated tagbar plugin to the latest version
Updated Tarbar configurations to include Namespace parameter
Updated keybindgs for the NERTree plugin
Updated PHP configurations
Updated keyboard mappings for customising current FT behaviour
Updated DelimitMate configurations
Updated UltiSnips to the latest version
Removed syntactic checkers option from the PHP config
Removed plugins conflicting with PHP
Only support a single space at the end of the line in HTML
Fixed an issue with indent/php.vim inserting it's own formatting options.