Merge pull request #28 from davidtrem/fix_leak_evol_display

fix leak evolution graph at startup and handle properly no leak evol cur...
py2_3 compatibility
py2_3 fix serma importer
py2_3 compatible utils
py2_3 fix hanwa importer
py2_3 fix hppi importer
py2_3 fix oryx importer
py2_3 fix serma importer