Create datepicker3.less
Remove border-radius mixin, as BS3 has done

See https://github.com/twbs/bootstrap/pull/6342 for details
Update color variables used
Minimize diff between datepicker.less and datepicker3.less
Fix bs3 color schemes
Increase specificity of table cell overrides
Fix sizing of table cells
Remove unneeded btn-styles rules
Added component support for Bootstrap 3.0.0

Bootstrap has changed how input groups are declared. This change adds ".input-group-addon" as a trigger for opening the datepicker.
Fix input-group styles
Cleanup datepicker3.less comments
Add bs3 build scripts and css file
Merge latest master into bs3 branch
Update dependencies
Remove stray comma from bower.json
Merge latest master into bs3 branch
Add missing comma to composer.json
Merge bs3 branch into master