Fixed #93. Updates to multiselect and refactored. Updating to 1.6.3.

Can now highlight/copy text in grid. Fixed multiple issues when using
multiselect along with shift key.  Won't highlight text when shift key
is down. Refactored key events so now they are all in the same directive
for viewport. Hovering over highlightable text will change cursors in
viewport. If column is not visible, won't be able to group by that
column. Updated plugin.
Update README.md
Update README.md
Fix for # 94.
Updated playground to always use latest build.
Fix for late bound data with initial grouping.
Fix for #90.
HTML5 drag and drop now works in IE9.

Thanks igoryan-k.
HTML5 drag and drop now works in Firefox
cleanup of some code and adding option to template aggregate rows.
Fix change log dates in README file
Merge pull request #104 from neeckeloo/patch-1

Fix change log dates in README file
Merge pull request #2 from angular-ui/master

pull request from source
Add grunt build script and WYSIWYG data export plugin.

Add grunt build script that does minification and concatenation. Add
WYSIWYG data export plugin.  Add ability to pass in plugins using
function literals rather than an instance of each plugin.
Merge pull request #109 from ineedfat/master

Add grunt build script and WYSIWYG data export plugin.
Fixes #100 from @1evan2
fixes #99 for @restless
Merge pull request #115 from maxcan/master

fixes #100 from @1evan2 and #99 from @restless