1.add .read.qaTask API to read task from a data.frame
close #36

Conflicts:

	R/AllFunctions.R
	R/qaCheck.R
add subset column to csv
add data.table support

Conflicts:

	R/AllFunctions.R
	R/getQAStats.R
	R/qaCheck.R
1.set channel and stain to NA if they are not needed for QA 2.use flowWorkspace:::.getPopStat to avoid rbind operation from getPopStat call to futher speed up
add data.table to depends list
add isChannel flag to getQAStats to eliminate the need of getGate and getData by default

Conflicts:

	DESCRIPTION
fix a bug in getQAStats.env

Conflicts:

	R/getQAStats.R
fix group outlier detection bug

Conflicts:

	R/qaCheck.R
	R/qaPanelFunction.R
	R/qaPlot.R
add qa.get.par to use global  name for the generic id col
strip the name from stats column
Default value for the local database environment used added for the data base operations.