Bug fix: TimeUnitQuantity.inverse() and TemporalQuantity.inverse() still returning time, not frequency

[Pr0methean]

#176 should be merged before this one.

HELP: Why are these simple changes causing the following, seemingly-unrelated, changes to fail?

[ERROR] Failures: 
[ERROR]   EBNFFormatTest.testParseInverseKg:80 expected:<[1/kg]> but was:<[one]>
[ERROR]   EBNFFormatTest.testParseInverseL:86 expected:<[1/l]> but was:<[one]>
[ERROR]   EBNFFormatTest.testParseInverseM:74 expected:<[1/m]> but was:<[one]>
[ERROR]   DecimalComparableQuantityTest.divideOperationsExceptionTest Expected exception: java.lang.ClassCastException
[ERROR]   DecimalComparableQuantityTest.multiplyOperationsExceptionTest Expected exception: java.lang.ClassCastException
[ERROR]   DoubleComparableQuantityTest.divideOperationsExceptionTest Expected exception: java.lang.ClassCastException
[ERROR]   DoubleComparableQuantityTest.multiplyOperationsExceptionTest Expected exception: java.lang.ClassCastException
[ERROR]   NumberComparableQuantityTest.divideOperationsExceptionTest Expected exception: java.lang.ClassCastException
[ERROR]   NumberComparableQuantityTest.multiplyOperationsExceptionTest Expected exception: java.lang.ClassCastException

[keilw]

#176 was merged, but this has some conflicts with the master. Could you raise it again please based on the trunk, the codebase is stable and .gitconfig also has the desired effect now. Thanks.