more nesting in button-groups.less
more nesting in navs.less

BS3 commit 65141338df7e40151a813d33a1194ddcbf464046
extract .label-variant mix-in

BS3 commit 906d04a4aad5feec3c1fc8e376712046dc6abacd
extract .progress-bar-variant mix-in

BS3 commit 084291aac7e8873ce975a4b547a9de6ac4630473
code.less: cleanup styles that get immediately overriden later in the file

BS commit 1045226544c6f9396227974b5543df1caf74f8cf
use LESS nesting more in dropdowns.less

BS3 commit f69afc1b238fe41996a6d6a9f2eb53ea092bcbf0
more nesting in buttons.less

BS3 commits b13417525c50c27d3fca64d6e0e3d2d7de91bedb
use nesting more in pagination.less

BS3 commit e0d1b83e259395b25ba2b996372f68eede16f5e3
more nesting in navbar.less

BS3 commit 46378c7ba3211134881f031a2fc8707e96706aad
code.less: cleanup styles that get immediately overriden later in the file. more nesting in buttons.less. use nesting more in pagination.less. more nesting in navbar.less

BS commits 1045226544c6f9396227974b5543df1caf74f8cf,
b13417525c50c27d3fca64d6e0e3d2d7de91bedb,
e0d1b83e259395b25ba2b996372f68eede16f5e3,
46378c7ba3211134881f031a2fc8707e96706aad
extract .alert-variant mix-in

BS3 commit 400e9b2a88050029f8ffdde278ab68192ecec196
rename the alert-variant mixin to alert-variant-todc to eliminate duplication in CSS