[API] Parallel: added atomicInc() for pointers
[API] String: added appendValue(Insist, Parallel)
[API] String: added appendValue(TExpand, Serial)
[FIX] Parallel: fixed template types for atomicAdd()
[INTERNAL] Parallel: pointer versions of atomicPostInc(), atomicDec(), atomicPostDec(), atomicAdd()
Merge pull request #196 from esiragusa/feature/atomic_append

Atomic primitives for pointer arithmetics and atomic appendValue()