fast-builder/Makefile: add external/eglib
fast-builder/libplsdk/Makefile: add libeglib
fast-builder: add libplutil
doxygen/Doxfile: add libplutil/plsdk/plconfig.h
add plsdk.ini as a sample config file

Add common/plsdk.ini to be typically placed in ~/.plsdk.ini to be
used by the PLSDK libraries and applications.  This contains
comments with all the currently supported options and brief
descriptions.
doxygen/Doxyfile: use PLSDK-VERSION for automatic version