copy in a version of the original django div.action

it's not an exact copy of what's in django 1.4, but it's really close. I
just added some documentation and some copy changes. I pulled the
markup from my browser window. I'm not sure where the original django
code lives.
add some bootstrap styling to the buttons
switch order of tags to the same as django's

see
https://github.com/django/django/blob/stable/1.4.x/django/contrib/admin/templates/admin/change_form.html
fix: restore missing object-tools block

if other forms are supposed to have an object-tools block, they may be
gone now. I'm only looking at change_form.html
refactor: use object-tools block to populate actions-right-alt block
fix, object-tools block got lost in change_list.html
Merge branch 'fix-missing-select-across'
Merge branch 'fix-missing-object-tools-block'