refine costfunction

marge BaseCostfunction and Constfunction to Costfunctions
change load path

changing load path to costfunction in papillon.py
not serious changes.

comment out some debag message.
rename some local value.
Merge branch 'master' of github.com:ymzkey/papillon

Conflicts:
	mock/libpapillon/Costfunction/__init__.py
new Evolution,jPSO has added.
pappilion.py and /libPapilin/Evolution/__init__.py are edited for jPSO.