scripts to build local Debian packages with pbuilder

Makefile

make deb - build debs for kmflcomp, libkmfl, ibus-kmfl
make cow - set up pbuilder environment
make tmpbuild(default) - build and install to /tmp/kmfl
make install_local - build and install to /usr/local
make uninstall_local - uninstall ibus-kmfl config file

non-release version numbers will be stamped with date to
distinguish between builds