Intermittent commit, DO NOT USE

In the middle of fixing stuff
Merge branch 'master' of https://github.com/ipidev/musicapp

Conflicts:
	MCAPP/bin/classes/mcapp/Beat.class
	MCAPP/bin/classes/mcapp/Score.class
	MCAPP/bin/classes/mcapp/Song.class
	MCAPP/src/mcapp/Beat.java
	MCAPP/src/mcapp/Score.java
	MCAPP/src/mcapp/Song.java

Ugh
MCAPP 0.3 - playback functionality

- Reorganised the Beat and Score classes to allow for easier playback
and addition (did this for the Song too, but not as much)
- Changed Sample to Note (makes more sense contextually).
- Added a global constants class Global. It also stores a temporary
global variable for now.
- Integrated Shavarsh's ShowImage class. Made it so it interacts with
the Song and not the MainActivity.

TODO:
- Sound recording
- Align the grid better, perhaps use a lookup table for the grid
position to note pitch conversion.
- Scrolling
- File import/export