New method DoubleMath.isPowerOfTwo() implemented (idea Eric Sean Conner)
and fft() and invFft() throw now NotPowerofTwoExceptions. Implemented
also corresponding tests. Clean up DoubleMathTest.java.
Modified Files:
src/java/de/fhworms/ztt/mepros/DoubleMath.java
test/src/java/unit/de/fhworms/ztt/mepros/DoubleMathTest.java
Added Files:
src/java/de/fhworms/ztt/mepros/NotPowerOfTwoException.java
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