Update copyright notices in all places

BS3 commits: 7fcfe61f4da41356b2ae974ad20536db0d74e83f
Fix bad anchor link in CONTRIBUTING.md

BS3 commits: 0a09dd46cbc8c76c766484fbbdb0c2af891a3b15
Improve wording in CONTRIBUTING.md

BS3 commits: 5e39e6c9d025eec4269da8391f2ff928a076a66c
add a breadcrumb-sm variation

Sometimes having smaller breadcrumbs is preferred. For example, you
have a masthead and a toolbar, do you really want/need a full-size
breadcrumb component?
adjust the border color for the toolbar

/cc #141