Added new suite
Merge branch 'master' of https://github.com/AnkurGel/bioruby-statsample-timeseries
added test_arima_ks.rb for Kalman Filter
Merge branch 'master' of https://github.com/clbustos/bioruby-statsample-timeseries into clbustos
Added accessors, changed class methods to instance methods, made KalmanFilter as a complete standalone module.
KF for ARMA(p, q) - https://gist.github.com/AnkurGel/87d079df72f8c6b13645
Added exception handling for stopping AR(1) or MA(1) process' minimization, converted vector to array before accessing the elements
Minor commit - Corrected indentation of tests. First set of KF's tests pass now!
Added module for LogLikelihood, Kalman Filter - complete.
All tests passes for KF and LL.