gruntfile - no need to be specific about which image types
update jquery to 1.11.0

update jquery to 1.11.0, so there is no `event.returnValue is deprecated. Please use the standard event.preventDefault() instead.` warning by default.
Merge pull request #272 from zhuangya/patch-1

update jquery to 1.11.0
Fix-273 Exceptions on execution beginning and never finished.

Change grunt-contrib-imagemin version to the latest
Merge pull request #274 from oaleynik/master

Fix-273 Exceptions on execution beginning and never finished.
upgrade bower-install to 1.0
Merge pull request #276 from stephenplusplus/master

upgrade bower-install to 1.0
Fix image revving

"*" matches directories too, while "*.*" matches only files.
Merge pull request #281 from silvenon/rev

Fix image revving
Fix jQuery location
Merge pull request #283 from gnarmedia/jquery-location-fix

Fix jQuery component path
Close GH-279: Fix Glyphicons path for Sass Bootstrap.
"Twitter Bootstrap" is now simply Bootstrap

See http://getbootstrap.com/about/#brand
Merge pull request #284 from cvrebert/master

"Twitter Bootstrap" is now simply Bootstrap
Rename 'yeoman' var to 'config'

Closes #285
Merge pull request #287 from creynders/patch-2

Rename 'yeoman' var to 'config'
Bower supports Github shorthands
Rev the favicon and touch icons if they are referenced in index.html

Note that this *breaks* automatic references to the favicon and apple touch
icons. Icons must be referenced in index.html.