Added Replace.py module.
Module capable of replacing a string within a HTML document.
A replace function makes this module so much more useful
Added availible modules to the README file
Replace on self is useless
Added regex support.
Plugin now takes a search and replace string (no regex supported) or a regex file.

Regex file format is: <regex1>\t<regex2>

Regex file contains pyton regexes so matching groups can be used
Try except added to re.sub to prevent plugin from crashing if incorrect regexes where provided. Removed default values for search_str and replace_str
Fixed bug where plugin stopped replacing
Cleanup
Merge remote-tracking branch 'upstream/master'
Added Linkrewriter description to plugin list
Merge pull request #3 from rthijssen/master

Added replace plugin