grunt dist

BS3 commits: 99b66c1f2c1556c00e1dd4aaf593f31b7b36071a
grunt dist
grunt dist. Fixes 11990 and #12159: Make range inputs block level and 100% wide by default

BS3 commits: 99b66c1f2c1556c00e1dd4aaf593f31b7b36071a,
7f153974e10980dccbdd485e63941b591e925148
Clarify that the focus docs styles are not in the repo, per twbs/bootstrap-sass#497

BS3 commits: 831bbb8b45ca5d6707433a724106b0d23949a3d9