Fix converge training procedure for undefined error values. Fix problem with epoch incrementor.
Fix converge training procedure for undefined error values. Fix problem with epoch incrementor.

stczhc/neupy,itdxer/neupy,itdxer/neupy,itdxer/neupy,stczhc/neupy,stczhc/neupy,itdxer/neupy,stczhc/neupy