Added Checkpoints to CDRserver.
pgsql v0.3.0+2 does not have support for encoding lists to JSON. #25

When you try to execute a command where one of the parameters is
a list, it will then try to parse it as a Postgresql Array, not JSON.
and when you try you will be meet with this message:
Postgresql array types not implemented yet. Pull requests welcome ;)
WIP made a prototype interface for testing refresh_tokens.
Cleaned up the database_src folder.
Changed the default owner to openreception.
pgsql 0.3 and style fixes.