Added unified laser server and config. Need to modify deepstar and cobalt.
deepstar.py: Added CLASS_NAME; removed Server.
cobolt.py: Added CLASS_NAME; removed Server.
Added some documentation and marked abstract methods.
Fixed: was erroneously using last loaded module for all lasers.
Changes to give cleaner exit.
Fix: CWS calls Server.stop(), not Server.shutdown().
After testing, cobolt lasers now added to supported list.