Prepare 0.10.0 release

Rev 0.9.0

Gaufrette metadata support

Merge pull request dustin10#94 from EmmanuelVella/namer

Add uniqid namer

Add upgrade information

Update UPGRADE for rev 0.6.0

Guafrette no longer hard requirement

Gaufrette integration

Merge pull request dustin10#12 from kbond/directory-namer

updated docs