made compile with gcc < 3.0
added d_agup_[cr]text_proc
the fileselector's themability is really broken in Allegro. worked around it.
worked around too small heighto of the file_selector editbox
worked around AGUP's editbox shifting, and fixed crash with sliders
worked around AGUP's editbox shifting
added closebutton support
header can be installed now
made somewhat less confusing
added saving of GUI colors