grim/guifications3

implement the preference uri command line and environment variable handling. This hasn't been tested yet, unit tests to come soon.

refs #69
SUBDIRS=sources gflib-sharp
pcdata_DATA=gflib-sharp.pc
pcdatadir=$(libdir)/pkgconfig
EXTRA_DIST=\
AUTHORS \
NEWS \
INSTALL \
COPYING \
README \
ChangeLog \
gflib-sharp.pc.in