updating grunt to 0.4
updating to grunt 0.4
0.6.3 release
added null check when getting model attribute #81
updated readme for #81
Pre-rendered select with mixed options and optgroup

Added handling of options without optgroup when one or more optgroups are present for pre-rendered selects
Fixed bug on pre-rendered select without optgroups
test for pr #87
Return the view on remove() to allow chaining.
Merge pull request #88 from toomanydaves/toomanydaves

Return the view on remove() to allow chaining.
Merge pull request #1 from NYTimes/master

Update to latest version