elm added from OTAWA hg repo
gel added from OTAWA hg repo
gliss added from OTAWA hg repo
otawa added from OTAWA hg repo
ppc2 added from OTAWA hg repo
added misc support stuff
otawa: fixed semi-renamed source file
otawa: lp_solve header path changed
patmos added as submodule
otawa: catch IO exception, output warning
submodule update