Rename create_pseudonym to create_nym

First step of issue #200

Beware: changes method names in public API
Merge pull request #234 from OttoAllmendinger/pr-fix-nyms-methodnames

Rename create_pseudonym to create_nym
Set defines for Doxygen

OTCrypto_OpenSSL and Lucre stuff was missing from the Doxygen docs.

Maybe not the best way to pass defines one-by-one but my CMake skills are
lacking here.
Move defines from stdafx.h to CMakeLists.txt