Remove comments code was refactored

RegExp is using for removing comments now. This works faster (~5-15%) and needs less code
Minified version using UglifyJS 2

Next toolkit was used: http://gpbmike.github.io/refresh-sf/
Date Built and version number update
Version number update
Version number update
Code optimization

1) Fixed unused and duplicating variables in xhr() arguments
2) Code was minified (unnecessary function and condition were removed)
3) Code style fixes
Update rem.min.js
merge remaining commits from #49