Fetch from cached file initially
Removed duplication in generating cache key
Removed cache#load_dir as loading files is now done dynamically
Refactored generation of cache file and story cached content into cache when fetched
Added deprecation for Billy.proxy.restore_cache
Version bump
Merge pull request #2 from centro/persistence

Persistence enhancements
Merge remote-tracking branch 'origin/centro_production' into named_caching

Conflicts:
	lib/billy/cache.rb
Update Gemfile.lock with new versions from last merge.