Update changelog, prepare v1.2.2

Support for 1.1 branch of silex, closes #23

Add trailing newlines to toml sample files

Prepare v1.1.5 release

Prepare v1.1.4 release

Add recursive merging feature to CHANGELOG, prepare v1.1.3 release

Change branding and README to include plain PHP

Add CHANGELOG file, prepare v1.1.1 release

Fix stability, add require-dev, fix autoload path