Merge tag 'v1.1.0' into develop

v1.1.0:

Lita 4.0 compatibility
Use ruby 2.1.4 instead of 2.1.3
Add Pronto gem to TravisCI

Builds will be tested with rubocop, flay, reek and poper.
Add VCR to ensure no HTTP request is made

Allow to test that the HipChat gem is correctly called without making a
real connection to its API.
Merge pull request #2 from Flink/feature/specs-with-vcr

Add VCR to ensure no HTTP request is made
Write correctly TravisCI config for Pronto
Update HipChat to 1.4
Use develop instead of master in Pronto
Bump version to 1.1.1
Merge branch 'release/v1.1.1'