Add FleepHookHandler

This commit adds a Handler for sending logs to fleep.io
conversations using their Webhook integration
(https://fleep.io/integrations/webhooks/).
Fix issues highlighted by @stof on first code review
Replace Curl with SocketHandler in FleepHookHandler
Merge remote-tracking branch 'anroots/feature/fleep'

Conflicts:
	README.mdown
CS fixes