add detail to navbar component alignment section

BS3 commit cd2d7b5
.navbar docs: update -fixed-* callouts, fix -link

BS3 commit 9af8838
Cleanup form-inline examples in docs

BS3 commit 57856e6
.col-span-* mentions to .col-lg-*

BS3 commit fcb7c9d
refined navbar styles in docs

BS3 commit e56c809
outdent the file list

BS3 commit 7e674ef
Add .panel-footer

BS3 commit 1d8ff36
Overhaul form control and button sizing, and some type styles

BS3 commit 28a081c
margin on bottom of navbar nav by default, also round links in mobile views (unround in desktop)

BS3 commit a41d566