Add methods for handling Facebook client
Merge branch 'master' of https://github.com/berkeleyjess/CDIPSDSW
Add function to drop pings before available_now added
Merge branch 'master' of https://github.com/berkeleyjess/CDIPSDSW
Merge branch 'master' of https://github.com/berkeleyjess/CDIPSDSW
Include new filters in RF analysis
Add more stats to evaluation script

Lessons that got no responses are now included in the number of
fast responses within the first 5 pings (as 0). Fraction of
lessons with wait time < 30 seconds is computed.