fix setup.py to install isfepy
fix setup.py to install isfepy

sfepy/sfepy,RexFuzzle/sfepy,rc/sfepy,olivierverdier/sfepy,BubuLK/sfepy,RexFuzzle/sfepy,RexFuzzle/sfepy,BubuLK/sfepy,rc/sfepy,rc/sfepy,RexFuzzle/sfepy,olivierverdier/sfepy,vlukes/sfepy,lokik/sfepy,BubuLK/sfepy,sfepy/sfepy,sfepy/sfepy,lokik/sfepy,olivierverdier/sfepy,lokik/sfepy,lokik/sfepy,vlukes/sfepy,vlukes/sfepy