Add warning to docs to not combine icon classes with other elements

BS3 commits: 56f4cf0316b03af888c22c62e4ef24e437b4a370
removed all caret border color settings.

BS3 commits: 2abaed98769bd3f5d9bf842c86bc25e4f6bfcd6d
grunt after merge of last pr; unsure why, but this is rengerating the banners and spacing

BS3 commits: 594d0c700dacbce8805bab1be6111631c8e003fb
Invert dropdown divider border in navbars

BS3 commits: 9f68a5b241fff2adce3b95b5c5b486e84a1d88d5
removed all caret border color settings. run grunt after last merge. Invert dropdown divider border in navbars. Prevent double border on tables in panels without thead content

BS3 commits: 2abaed98769bd3f5d9bf842c86bc25e4f6bfcd6d,
9d485db721ba248224696eb63eafdfabad1fcbe2,
9f68a5b241fff2adce3b95b5c5b486e84a1d88d5,
c13524e7e0f3d2a62935bbe2cb57c1388e04e052
removed all caret border color settings. Invert dropdown divider border in navbars

BS3 commits: 2abaed98769bd3f5d9bf842c86bc25e4f6bfcd6d,
9f68a5b241fff2adce3b95b5c5b486e84a1d88d5