fix tempclu bug
keep the temp clu saving before splits
introduce besttemp.clu file
introduce SaveTempCluEveryIter option
score checking - only save temp.clu if score better
tidy up tempclu saving
Merge pull request #20 from klusta-team/savetempclu_good

Savetempclu good
Merge remote-tracking branch 'origin/master' into filter_noise_spikes