AbstractUnit.equals(Object) should accept units from same dimension

[mbe24]

2.54 cm == 1 inch --> true, not false.
How much digits precision should be used?

[mbe24]

Could be a bad idea, since hashCode would have to behave accordingly.

[mbe24]

Round to given precision before using hashCode. Also add precision management. Could be handled together with enhancement for dedicated Value type.