Release 1.1.0 (to prod)

This release includes:
* new feature: postgres (PG) support ( #9 )
* new feature: express now captured with controller-action's identified, and render time displayed as well ( #16 )
* improve host identification on node entry  https://github.com/appneta/node-traceview/commit/b56def76e701912a2297bc6992b56157f6389409
* fix possibility of missing exit events if the response stream is chunked and terminated early ( #7 )
* fix configuration of debug logging to combine with rather than replace environmental settings ( #8 )
* test re-write / re-factoring ( #12 )