Added less-1.7.1 to lib
added bootstrap with mixin and variable overrides to style
added use_bootstrap_3 view decorator
added bootstrap 3 toggle
update precompiler to handle two different versions of less depending on whether our old less files are summoned or new ones
initial changes for bootstrap 3 to base.html
add context processor to set use_bootstrap_3 template variable
add navbar-nav class to navbar (note, does not affect styling of current navbar at all, but necessary for bootstrap 3)
test out the bootstrap 3 decorator on a small view for now (my settings)
added bootstrap-3.2.0 as a submodule to style/lib
added fontawesome-4.1.0 as a submodule to style/lib
Merge pull request #3876 from dimagi/bootstrap-3-tag

Initial Changes to use Bootstrap 3