Use dateFormat in HtmlFormatter
Embed context and extra datas in tables
Added emoji support as per slack api doc: https://api.slack.com/methods/chat.postMessage
Updated position of iconEmoji variable to prevent BC breaks
Added a new test for Emoji, reverted old tests
Restored the $ regex string terminator for the WriteContext test
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
Stream Handler Throw Invalid Argument If Not String Or Resource
Remove Debug Code
Removed unnecessary test code and corrected doc style
Group handler that ignores failures

This allows a group handler which on a single handler failing will
continue and allow subsequent handlers to record the event.
Update readme to indicate why you might use WhatFailureGroupHandler
Test suite and supporting handler for WhatFailureGroupHandler
Strip documentation, don't want to overstate.
Added MandrillHandler for sending log messages to the Mandrill API
Add prefixes to the context and extra record keys. Needed as some processors have the same keys as the the context. Specifically, the IntrospectionProcessor has "line" and "file" that can overwrite an error context "line" and "file".
Removed Guzzle dependency from Mandrill handler. API calls are now done via cURL
Fixed a docblock typo in Mandrill handler