Lossless audio support of Meridian

Thank to avs234 and his work Andless, from 0.15.0 Meridian supports lossless playback including flac, ape, alac, wav, wave pack, and mpc.

Some words to say:

- You can play these files as normal ones, but tags (and thus album arts) won't work because Android does not scan them. Meridian does not have its own tag parsing system.

- flac cues are not supported, because there is an integration problem with current cue system.

Enjoy!