[MRG+1] Verbose message in RFE to count from 1, not 0

Verbose message printed while using RFE should count from 1, rather than 0.

    Finished fold with 0 / 86 feature ranks, score=0.708241

Should begin:

    Finished fold with 1 / 86 feature ranks, score=0.708241

At the end of the fold, the current and total feature ranks will be equal instead of differing by 1.