Build system items from TODO

Build system items imported from TODO:

- Enhancement: Better out of box support for cross-compilation. (Autotools still the gold standard here but also try to support with CMake).

- enhance detection of `DUMA_MIN_ALIGNMENT` in createconf use defines specifying the target architecture use compiler attributes which specify the necessary alignment

- (Possibly) add autoconf/automake build process (useful for cross-build)

- (Possibly)libtool to build shared libraries in Makefile depends on autoconf/automake

- (Possibly) use configure to detect if f.e. pthread.h is installed and in search path check if pthread available before using it in Makefile depends on autoconf/automake