Created option UI + added wrap functionality
Added functionality for trimming trailing whitespaces
Rewrote parts of the parser/AJAX call

There were problems with send booleans through via AJAX since they are
interpeted as strings by PHP...
Disabled spellcheck on textareas
Implemented synchronized scrolling
Added rtrim for the parser's output

This fixes the issue where an extra \n was created at the end of the
file.
Added an option to autoselect the output
Added GitHub fork & watch buttons