fixed bootstrap 3 issues

updated less file to point to new bootstrap 3 vars and mixins.
updated js file to include some v3 updates from others and put
glyphicons back (it's BOOTSTRAP-datepicker, don't want to use bootstrap?
don't use bootstrap-datepicker..duh)
fixed component example
Merge pull request #1 from Eonasdan/master

finished fixing bootstrap 3 compatibility