catch Errno's and RestClient errors and throw a more meaningful couchrest error
fetch secret token for signing cookies from config
send salt on Session#create without srp ephemeral A
send more meaningful error message on completely failed login attempt
fixed tests to use setup and teardown blocks
make sure user tests also run when run from users subdir

* The APP_CONFIG needs to be initialized in core so that is required from other engines
* paths for load_views need to be relative to the model - not to rails root.
make sure only our own models are loaded

This is just a quick hack. we should move all engines to a dir of their own.
Merge pull request #42 from azul/bugfix/fix-migration-requiring-active-record

make sure only our own models are loaded
Merge pull request #41 from azul/feature/allow-getting-salt

Allow getting salt and proper error messages for invalid login attempts
Merge pull request #38 from azul/feature/meainingful_couch_error

catch Errno's and RestClient errors and throw a more meaningful error
Merge pull request #39 from azul/feature/keep-session-secret

fetch secret token for signing cookies from config
Merge branch 'master' into feature/billing