Added Travis-CI status
Updated with FTN6 changes
Added ChannelContext and HTTP/ChannelContext according to FTN5 & 6 changes
Updated according to FTN5: HTTP integration

- Added not yet tested HTTP/Executor
- Added not ye tested SourceAddress
Initial bugfixes for HTTP/Executor and added infrastructure for PHP-FPM testing
Completed basic testing of HTTP/Executor
Updated for release v0.2