Echo effect
Merge branch 'master' of https://github.com/Astvaldur/ES-Project-Spring-2014

Conflicts:
	Source code/SW/soundlie/src/effects.c
	Source code/SW/soundlie/src/effects.h
	Source code/SW/soundlie/src/irq.c
	Source code/SW/soundlie/src/main.c
	Source code/SW/soundlie/src/pc_communication.c