Mu 0.3 release

Mu 0.3 release plan

Phase              Original plan  Updated plan   Realized
Feature Freeze     ---            ---            ---
Alpha Release      7th Dec 2014   7th Dec 2014   7th Dec 2014
Beta Release       ---            ---            ---
Stable Release     ---            ---            ---
Release Candidate  ---            ---            ---
Final Release      ---            ---            ---

New Features:

Core:

• New plugin manager core[Code Name: Honoka].
• New preference system.

Music Module:

• New Playlist core.
• LRC display.