TODO

Add suggested packages to composer.json
Add requirements check to \Monohook\Processor\AbstractProcessor
Add core concept to README.md
Write more tests

Handlers

Create EmailHandler
Create StreamHandler

Processors

Create ContentFilterProcessor
Create ImageOptimizerProcessor - check if there is a way to auto-add optimized images
Make it possible for processors to be more verbose (i.e. list files being checked)

Providers

Create MercurialProvider
Create SubversionProvider