introduce Cache<T>
remove EnvelopesParameters class
use Cache<T> for DeMarkerIndicator
add Equality members to stochastic parameters
optimize CCI indicator
support bands_shift
optimize WellesWilderSmoothing
optimize iRSI
optimize Bollinger bands
optimize ADX
fix ATR
fix MacdCrossOver
use Cache<T> in StandardDeviation cache
fix iWPR
fix iSAR
use Cache<T> in Momentum cache
use Cache<T> in IchimokuKinkoHyo cache