Add wildcard support. Fix #23.

This feature breaks compatibility
  - path to freeze relative to config now (like "paths" or "follow_symlinks")
  - paths like "./i/" should be replaced with "./i/**"
Add wildcard support. #23

Add minimatch to package.json
Add wildcard support. #23

Update docs
Merge remote-tracking branch 'origin/issue-23'

Conflicts:
	lib/freeze.js
Fix tests after merge #23