room_positon sends now a proper info message with track_event
Cleaning up stale sessions more rarely.
Added API for generating a new session ID. (#212)
Generating session IDs on user track and removing them when user is lost. (#212)
Moving gen_random function to session.cpp. (#212)
Passing c-string (char*) representation of session id to snprintf. (#212)
Merge pull request #215 from ami-lab/f/#212-create-less-sessions

F/#212 create less sessions
Reverting back to 5% probability of cleaning up old sessions. (#212)
Added method for retrieving the last N measurements of a session with a certain property. (#190)
API now returns session measurements instead of last updated time. (#190)
f/#187 Completed
Merge branch 'master' of github.com:ami-lab/AmI-Platform into f/#187-API-endpoint-for-retrieving-properties-of-a-sid-t-pair
Merge branch 'master' of github.com:ami-lab/AmI-Platform into f/#184-compute-skeleton-joints-coordinates-fix-track_event-usage
API endpoint now also returns the last measurements with x, y, z, t. (#190)
Merge pull request #217 from ami-lab/f/#190-API-endpoint-for-retrieving-active-sessions

F/#190 api endpoint for retrieving active sessions
Merge pull request #214 from ami-lab/f/#184-compute-skeleton-joints-coordinates-fix-track_event-usage

room_positon sends now a proper info message with track_event
Merge branch 'master' into f/#187-API-endpoint-for-retrieving-properties-of-a-sid-t-pair

Conflicts:
	api/api.py
	test/api/test_api.py
Merge pull request #218 from ami-lab/f/#187-API-endpoint-for-retrieving-properties-of-a-sid-t-pair

F/#187 api endpoint for retrieving properties of a sid t pair
Add script that uploads images from face_samples/ to PyBetaFace. #216
Added upstart + monit scripts for newrelic_plugin_agent. Closes #219