[TASK] Update notification channel to t3pb

This package is mainly meant to be open source and
actively used in the package builder. So the
notifications are now sent to the t3pb team channel.
[TASK] Cleanup library versions

This change removes all older versions and updates
the latest release to 1.0 RC5. This is in line
with tagging a version based on Ember 1.0 as soon
as it's released.
Also removes the adapter version configuration as
it's no longer supported by the RESTAdapter.
[TASK] Simplify REST adapter
[TASK] Kickstart simplified adapter / serializer

Not finished yet.