chore(travis): add gitter config
fix($animate): ensure all comment nodes are removed during a leave animation

Closes #6403
docs(contribute): add table of contents to contributing doc

- add linked list to top of document
- add anchor elements to secondary headings

closes #6287
docs(guide/directive): update directive restrict options

- add missing 'C' restriction for class names
docs(errors/infdig): add a common example

Mention common cause of error is binding to a new array on every $digest loop.

Closes #6465
docs(guide): add a new django tutorial

 - add a link to a tutorial on intergrating angular and django
docs(guide/resource): add links to ngResource and $resource
docs($injector): fix typo

Duplicate 'that' words present in the document, just remove one of them.

Closes #6469
docs(changelog): fix typos
chore(scripts): fix typos in scripts/utils.inc
docs($compile): fix typo
docs($sce): fix typo
chore(animate): fix typo in a comment
chore(AngularSpec): fix typo
chore(ngRepeatSpec): fix typo
chore(filtersSpec): fix typo
chore(httpSpec): fix typo
chore(parseSpec): fix typo
chore(qSpec): fix typos
fix(jqLite): properly toggle multiple classes

Fixes #4467
Closes #6448