Integrated travis.
MKUnit passes tests.
MKQuantity passes tests. Added Length and Mass units.
Corrected tonne.
Addede Byte units.
MKByteUnit passes tests.
MKTimeUnit passes tests.
MKMassUnit passes tests.
MKLengthUnit passes tests.
MKAreaUnit passes tests.
MKAreaUnits+Imperial passes tests.
Added podspec.
Merge branch 'release/0.9.0'