Removing WINNT version preproc overwrite from almost everywhere, troubling boost or tbb. Current (haha) windows is now required to access try-lock kernel functionality.

Moving interpolation routines (from VDL implementation) to ITABase and making them available for public use

Updating GCC built-in atomics as impl for ITA atomic ops / primitives. And some more tests with VistaTicker.

style
cleanups
moving definitions to ITATypes (domain, quantization)

Removing SPLINE integration (GPLv2) and created ExternalLibs packaged with same name using shared lib. Only required by ITAOps (solely required by RAVEN).