Monoid instances should not be derived from underlying type where we want them
to be type specific. Added tests to make sure they are correct.
Other typeclass instances that are dependent on type specific behavior should
also be independently defined rather than derived.
Removed Alternative instances as they are not correct yet.
Removed redundancy by using CPP macros to define instances of different types.
Also rename asyncly to aparallely and runAsyncT to runAParallelT
The name Async is confusing and does not convey the right meaning. The 'A' in
AParallelT stands for 'Adaptive' and 'Parallel' indicates that this is a
variant of Parallel.
Another choice for the name was 'MParallelT' where 'M' stands for 'maybe', it
is maybe parallel since it may or may not start parallel threads depending on
demand but Adaptive fits better as it adapts to the demand.
