Postgis Adapter support.
Merge remote-tracking branch 'seuros/master' into postgis_and_travis_concurrency_support
Rails 4.0.0 is out!
use new 0.0.9 version of WithAdvisoryLock::DatabaseAdapterSupport,
revert use_attr_accessible? issue [fixes issue 66]
no more 1.8.7. EOL.