Better support for local Gemfile changes, see doc/examples/Gemfile.local
Improved db adapter control, move more optional gems to Gemfile.local

Can now override the database adapter using DB_ADAPTER environment
variable or a constant in a Gemfile.local file.  Can also prevent
other adapters from loading by setting a constant to 'custom'.
Move some optional gems to doc/examples/Gemfile.local, minor cleanup
Switch from pry pry-rails, pry replaces irb for rails console
More changes associated with which db adapters to inc. in Gemfile locks
Create Gemfile.heroku to force sqlite3 out of lock file (heroku no likey)
Merge branch 'master' into heroku
Make even more gems optional via Gemfile.local (esp. growl vs libnotify)
Get all tests to pass again (factory changes needed)
Fix broken css/js asset links on new event page due to pipeline