#99 Lookback for TA_CDL3OUTSIDE is bigger than needed

[Alexander Trufanov]

TA_CDL3OUTSIDE_Lookback is hardcoded to return 3. So TA_CDL3OUTSIDE uses startIdx = 3 by default. But it access only indexes i,i-1,i-2 in tight loop. So it begins with elements 3,2,1 although it may start with elements 2,1,0. I suspect that Lookback shall return 2 otherwise function unnecessary ignores very first candle if startIdx <= 2. What do you think?

[Alexander Trufanov]

Same for CDL3BLACKCROWSand for TA_CDLENGULFING