Fixed dataTransfer.getData/setData to work with IE

IE needs the first argument of dataTransfer.getData/setData to be Text or URL. See: 

http://msdn.microsoft.com/en-us/library/ie/ms536744%28v=vs.85%29.aspx

Fix tested on IE, Chrome and Firefox.
Merge pull request #42 from jacobilsoe/fixes

Fixed dataTransfer.getData/setData to work with IE
Update Readme with License.
Update draganddrop.js

Add channel information to the dataTransfer and expose it on drop.
Merge pull request #1 from Marc-Andre-Rivet/mrivet-on_drop_channel_info

Update draganddrop.js
Fix memory leak, add license, create test.html to reproduce errors
drag hover class update and fix throwing up on memeory leak. Updated test with 1.2.29 angular
test dnd support in browser
Update draganddrop.js

Did not work in IE11, need to put everything in "Text"
Update index.html

Documentation update for $channel
Update draganddrop.js
Update draganddrop.js
Merge pull request #44 from Marc-Andre-Rivet/master

Adding $channel information on drop
Merge pull request #2 from ganarajpr/master

Pulling from ganarajpr:master
Allow drop to validate the dragged content

Allow drop to validate the dragged content beyond the channels information.
Here, I am trying to prevent an element to be dropped onto itself.

Since 'dragEnter' does not expose the dataTransfer value, as per 6.7.6 (link below), keeping a local copy of the latest data (in object form), to be used for comparison purposes on the 'drop-validate' attribute.
http://www.whatwg.org/specs/web-apps/current-work/multipage/dnd.html#dndevents
Update index.html

Updating documentation for drop-validate
Update index.html
Merge pull request #45 from Marc-Andre-Rivet/master

Allow drop to validate the dragged content
Set dragging counter to zero after drop

It preventing class to be stuck on hover.
Merge pull request #48 from petarslavnic/master

Set dragging counter to zero after drop