Added ez_setup to install requirements 

Without ez_setup 'sudo pip install cloudplaya' fails with 'ImportError: No module named ez_setup'
Updated the download folder path to be simple for the download all function
Update README.rst
rather than look for a specific form name, which could be changed, check for the existence of the fields we need instead
Added getting track metadata.
Completed song metadata updating.
Merge remote-tracking branch 'dhrp/patch-1'
Merge remote-tracking branch 'tinkerbotfoo/master'
Merge remote-tracking branch 'maurice/patch-1'
Merge remote-tracking branch 'paul/master'
Merge remote-tracking branch 'mshuffett/master'