add .help-block to form field state mixin

BS3 commit 9da90adb4ca09e4c3b5ec549211c07292ec38d71
simplify tables.less

BS3 commit f8eb9136ebba85dc74b495becf55c56bfa79a638
use inline-block on .img-responsive

BS3 commit 08b3515fd7dfa76cdbb92d52a15d6797f3a1c4ed
Make more components mixin-friendly

BS3 commit  a27ecfccf301f8996d7ddf6bd6f7f46f358a5a31
add .help-block to form field state mixin. use inline-block on .img-responsive. slightly larger carousel indicators. Make more components mixin-friendly

BS3 commits 9da90adb4ca09e4c3b5ec549211c07292ec38d71,
08b3515fd7dfa76cdbb92d52a15d6797f3a1c4ed,
c9df1db50221fe033a0b7bc216fa2de5b6eea17a,
a27ecfccf301f8996d7ddf6bd6f7f46f358a5a31