Improved the Raven handler when using a Buffer handler
Amended PR #203 (RavenHandler batch improvements)
Filtered records based on their level
Took the record with the highest severity as the main one
Merge pull request #1 from pvanliefland/raven-improvements

Amended PR #203 (RavenHandler batch improvements)
Added an handler for NewRelic:
* implemented a test which verifies that the fallback handler handles records when the NewRelic PHP extension is not installes
* implemented the actual handler
updated the documentation
removed the logic for the fallback handler, its out of place, adapted the "test"
refactored the implementation of the NR handler and its test:
* the test now checks that if the extension is not loaded, an exception is thrown
* the test now mocks the new relic native functions
* moved some parameters as constants in the handler class
Allow multiple users for PushoverHandler

The construct accepts a string or an array of user ids to keep backward compatibility.

In case of an array, a message is built and send for each of the users.
removed netbeans files committed by mistake
Merge remote-tracking branch 'fabpot/raven-improvements'
Fix issue in handleBatch when all records are below the minimum level, refs #203
Rename logFormatter to batchFormatter, refs #203
Add error handler, fixes #199
Fix feedback
Add tests and fix issue with array_merge
Make the ErrorLogger work with any logger interface object
Merge remote-tracking branch 'odino/master'
CS fixes and set the default NewRelicHandler level to ERROR, refs #105
Fix tests
Merge remote-tracking branch 'EmmanuelVella/patch-2'