README update

Added the quick installation guide and extended the support / community section
Corrected the lines
Updated the minified CSS and JavaScript files
README update
Corrected setup language sting
Smaller UI corrections & improvements
Updated setup files for versioning
Merge remote-tracking branch 'invoiceplane/development' into datepicker-update

Recompiled minified assets.

Conflicts:
	assets/default/css/style.css
	assets/default/js/scripts.min.js