Added in some of the playlist subsystem, I've never done anything in node / c++ before so this was a fun learning experience \o/
Lets see what this travis stuff is all about :)
Added subscriber changed notification and num_subscribers function
Changed player to be a stream and built in stream backpressure handling so that libspotify only gives us data as we require it
Fixed memory leak by introducing a HandleScope into the music delivery process, it seems to work....
Merge branch 'master' into dev-n
Merge commit 'b0cc0b04ef610578f9085c07364f75d226b42199'
Merge commit '258bc5ab8906f77b3e54c99c42c67944b4e290fb'
Merge commit '2722df7597c6e16d8edbf44576ec64a427d3445b'
Merge commit '6d984142d9b0c8ef2c0986f6c8263e54e9f5cea2'
Merge commit '11940c23b1a6a54be5fc8fbbef22b124c2130222'
Merge commit 'a19bf2070e6aed52dc592b3d97c19a8cf61ff05e'