Removed lock for library calls.
Reader now serves as context manager and preserves exceptions inside.
DummyReader now serves as context manager when there is not reader involved.

+ Changed exception handling mechanics to using context.
Removed unused config option.
webapi server now provides |make_server| instead of |run|

+ This change should allow code sharing between service and standalone application.
Reworked startup sequence.

+ Removed unused multiprocessing imports.
+ webapi startup now uses |make_server| instead of run
Version 1.5.13