Merge pull request #200 from acemir/develop

Added "optgroup" support and improved "disabled" suport
Updated readme and version number in files
Peer review changes: adding to readme and removing dead code
Peer review: removing missed dead code
Proposes solution to prevent FOUC + Refactoring code
FOUC adjusts
FOUC adjusts for IE
FOUC adjusts for Win7

IE11, FF29, Chrome34, Opera12.16 - Win7
Merge pull request #202 from acemir/version-1.5

Proposes solution to prevent FOUC + Refactoring code
Added gulp to project
Merge branch 'version-1.5' of https://github.com/Robdel12/DropKick into version-1.5
Remove the insertion of "dk_fouc" class

+ FOUC solution works perfectly in all major browser running in Windows
7, Windows 8 and Ubuntu 14.04
+ Verified also on OSX 10.6 but it performs only a mild difference in
the position of the text
Async loading GIST almost no FOUC

Loading GIST asynchronously we hardly realize FOUC
Revert "Async loading GIST almost no FOUC"

This reverts commit 045a8557d2bb476c6b807f3a8e5e9bd36a9578f9.
Async load GIST almost no FOUC

Loading GIST asynchronously we hardly realize FOUC
Merge pull request #203 from acemir/version-1.5

Remove the insertion of "dk_fouc" class
Updated read me for 1.5 update
Merge pull request #201 from Robdel12/version-1.5

Merging Version 1.5
Removed dead weight
Updated gulp and fixed issue #205