Merge branch 'release/1.3.0'
Merge branch 'release/2.1.0'
Merge branch 'release/2.1.1'
Merge branch 'release/2.1.2-docs'
Merge pull request #15 from datasift/release/2.1.2-docs

Release/2.1.2 docs
Merge branch 'master' of https://github.com/datasift/datasift-php
Added timeout on streaming to cope with 'silent' server-side disconnects
Merge pull request #17 from datasift/feature/fix-DSP-221-connect-timeout

Fixes reconnect issue from server-side disconnects.