Refactored names of notification transports. Part I: Hipchat

Signed-off-by: Daniel (dmilith) Dettlaff <dmilith@verknowsys.com>
Big refactor due to new Notifications mechanism. More in details.

* New notification rules. No more unreliable SERVICE_PREFIX/.errors file.
* Implemented notification center notification mechanism for error level messages from SvdService.
* Removed hipchat and notification specific old code from previous try.
* Fixed project files and tests.

Signed-off-by: Daniel (dmilith) Dettlaff <dmilith@verknowsys.com>
Rewritten Notification mechanism basically from scratch. It's now simple, roboust, clean and universal.

Signed-off-by: Daniel (dmilith) Dettlaff <dmilith@verknowsys.com>
Fixed potential failure in sha1 generation.

Signed-off-by: Daniel (dmilith) Dettlaff <dmilith@verknowsys.com>
Fixed compler warning in main.cc of Panel.

Signed-off-by: Daniel (dmilith) Dettlaff <dmilith@verknowsys.com>
Added XXX to fix in panel.

Signed-off-by: Daniel (dmilith) Dettlaff <dmilith@verknowsys.com>
This branch is known to be stable.

Signed-off-by: Daniel (dmilith) Dettlaff <dmilith@verknowsys.com>