Synth, SynthXmConverter: added sample loop type handling (without loop points yet)
ArbitaryArray: added addTwo()
Synth, SynthXmConverter: added handling of sample loop start and loop length, moved sample position calculation to Synth.getSamplePosition()
Synth, SynthXmConverter: added handling of instrument finetune
Minor cleanup
Merge pull request #6 from gheja/dev6