Drop vestigial getDependencies() method.

That system is no longer used. Package-level dependencies for static files are expressed in the dependencies/site.yaml file.
Merge pull request #49 from isaacgrant/get-dependencies-no-more

Drop vestigial getDependencies() method.
prepare for release of 2.1.4 | package party
Always leave the _authentication_token set.

This was added a long, long time ago as a part of the StoreSessionModule
in silverorange/store@64a2853 where CSRF prevention was added for all
sessions that had accounts. It was then later moved to the
SiteSessionModule in commit silverorange/site@1c9b22e. It was at this
point that CSRF was added for all active sessions on the website. We
want the _authentication_token set at all times now so don't unset it
when a logout occurs.
Move the last auth token code to session module.
Generate the token if the session doesn't have it.
Make the account index page more subclassable.
Merge pull request #51 from charleswaddell/more-subclassable

Make the account index page more subclassable.
Make the edit page more subclassable.
Merge pull request #52 from charleswaddell/more-subclassable

Make the edit page more subclassable.
implement SwatDBCacheNsFlushable
Make more subclassable.
Merge pull request #54 from charleswaddell/more-subclassable

Make more subclassable.
require a new swat
Merge pull request #53 from nburka/swat-db-memcache-flush

implement SwatDBCacheNsFlushable
Remove whitespace.
Merge pull request #41 from charleswaddell/six-year-old-bug

Always leave the _authentication_token set.
add getValidMediaTypes method
fix docblock
be smarter and use the id to make it unique