Merge branch 'master' of github.com:fog/fog into dir_metadata
[rackspace|compute] added test for put_container with an optional parameter
[rackspace|storage] updated directory to lazy load metadata when necessary
[rackspace|storage] added tests for metadata class; fixed bug with method missing
[rackspace|storage] updated file class to use the same metadata implementation as the directory class
[rackspace|storage] added test to check for metadata on object creation; tweaked metadata on object creation test
[rackspace|storage] updated metadata class to decode incoming header values using FOG::JSON
[rackspace|storage] rebased with dir_metadata branch - https://github.com/fog/fog/pull/1563
merging with the latest file_metadata