Fixed Crash when launching from background while audio playing; Ability to manage Sample Rate

[soulfly]

My fork contains 2 changes:

1. Fixed issue Crash when launching from background while audio playing #15 (comment)
2. Now you can manage these variables:

define sampleRateT 8000.0

define IOBufferDuration 0.0232*2

look at this file https://github.com/soulfly/novocaine/blob/master/Novocaine/Novocaine.m
I think custom sample rate in your origin repo isn't working, i tried to set something other that 44100, but always 44100 i saw in log.
So, please review this issue and add to origin repo if you accept it.

Thanks

[alexbw]

@ndonald2 Is this redundant with the pull request you merged?

[ndonald2]

Not redundant - there are some useful changes in here (methods to route to speaker) but also a few things that I don't think should be merged in (voiceprocessing subtype by default - should maybe be an option, but not default)

I don't know enough about the crash fix to verify it or not.

[alexbw]

Is this something that we still should merge in?