init state-machine branch
Refactor Backtest()  #36

more ReferenceClasses
Refactor Backtest()  #36

more ReferenceClasses
Revert "Refactor Backtest()  #36"

This reverts commit e6571b458a4e4b85818958a5a388e8ed9613d698.
Merge branch 'state-machine' of github.com:danielkrizian/strategery into state-machine

Conflicts:
	R/backtest.R
redelete ATS.R
fix merge
further refactoring of Backtest() as #36
fix summary.drawdowns for zero ddends
fix avgwin metric in no wins case
object model redesign (#36 and #38)
'check.state' implemented. Closes #37. All-vector backtests working
work towards #39
enable indicator arithmetic operations
(e.g. 0.002/(ATR/P))
initial commit. complete restart number 3
Merge remote-tracking branch 'origin/state-machine2'