add nav to media object and thumbnails

BS3 commit a0c44329e31f4ab3f1a5ea241074f0e7bd50a3f8
use separate `form-group`s in horiz form example for greater generality

BS3 commit b5dcbf5045cf9b533c6b47718a7ee29be5a9092c
JS docs: fix caps of "CSS" acronym

BS3 commit 3a96ff9a0a9c1eac4d19fb708e1901cc81d2d9df
JavaScript docs: fix caps of "JS"

BS3 commit 364fdf7fa12c962600271d07c0cafd67d78c2e51
add table-layout. make navbar-text float left. move form layouts from input groups back to forms

BS3 commits 4bac2c567a139958cb2ff35f7ad30c7dcd8527a3,
a3be713f8f61e8c37c4bf3db94a51dfc83ac935b,
9435991ff0ffa79c027f12c0a08aa13376c3b2fe