Add tuxmathscrabble RPM

Added tuxmathscrabble RPM files from source
http://pkgs.org/opensuse-12.3/opensuse-education/TuxMathScrabble-0.7.4-12.4.i586.rpm.html

Download link
http://download.opensuse.org/repositories/Education/openSUSE_12.3/i586/TuxMathScrabble-0.7.4-12.4.i586.rpm