Updated to make it work with newer versions of Gimp (2.8.x) and gtkdatabox…
requested to merge update_to_make_teseo2_work_with_new_versions_of_gimp_2_8_x_and_gtkdatababox_0_9_1_1_and_further into master
Updated to make it work with newer versions of Gimp (2.8.x) and gtkdatabox (0.9.1.1 and further, tested against 0.9.2.0 version on Linux and 0.9.1.1 on Mac OS X).