Added availableMemory parameter to SchedulingAlgorithm.getNextJob().
Basic version of memory constrained version implemented.
Merge branch 'MemoryConstraints' of https://github.com/EkardNT/CPUSchedulingSimulator into MemoryConstraints

Conflicts:
	src/com/jimweller/cpuscheduler/CPUScheduler.java
	src/com/jimweller/cpuscheduler/RandomSchedulingAlgorithm.java
Added memory available progress bar to main interface.