v0.8.1.0 RC2

Release Candidate 2 for version 0.8.1.0

• There's now an auto setting for the runtimePerCore, where it will test all FFT sizes before continuing to the next core
• It's now possible to define a custom FFT range in the FFTSize setting (e.g. 8-24)
• Improved error detection when CPU usage was too low
• Changed the verbosityMode setting to logLevel and added two more options