Fix heading updating in toolbar plugin
show block controls by default in oerpub
remove logic for conditionally showing semantic block controls
More generic way of getting buttons

This works for both oerpub and github-book, by using the first button in
the "headings" area as the heading button rather than a specifically marked
item. Also, fix small bug that assumed the element in the range is the heading
itself.
refs #435: replace the bootstrap with mockup warning icon
refs #435: make 'Description Missing' gray and italicized
refs #435: make 'Description Missing' gray and italicized
update note css
make note titles bold
tweak padding on semantic elements
Remove last reference to headingFunc
refs #435: spacng between warning icon and text
Merge pull request #23 from oerpub/oerpub-heading-plugin

Fix heading updating in toolbar plugin.
Tested on OERPUB client and OERPUB's github-book successfully. Should be working for CNX' github-book editor as well.
jquery 1.8 compatible way of reordering keydown event
Merge pull request #31 from oerpub/ticket435

Ticket435
Merge pull request #30 from oerpub/ghbook-ticket456

Use jquery 1.8 compatible way of reordering keydown events
Merge pull request #29 from oerpub/ticket-349

Note styling tweaks
fix merge conflicts witch branch ticket-454
Merge branch 'master' into ticket-441