Fixes and improvements
Some more stability improvement
Added missing method lost during a code rebase
Fix playlist image bug
Multithreading redesign to avoid race conditions and streaming errors.
Also added a preventive restart to avoid problems and delays when
starting to play songs.
Added scheduled restart and improved multithreading for play restart
Increase timeouts
Changed some locks to semaphores and added thread syncronization to spotify web api
Show no results in toptracks when empty
Bugfix to track uri generation from gid and track availability checks.
Merge pull request #3 from pablorusso/stability_streaming

Stability streaming