add logicalGate to support the result returned by clustering-based gating. RGLab/openCyto#73
Merge branch 'trunk' into logicalGate
Merge branch 'trunk' into logicalGate
Merge branch 'trunk' into logicalGate
Merge branch 'trunk' into logicalGate
replace sampleName output with dots for getSingleCellExpression
add showHidden argument to getChildren method
Merge branch 'trunk' into logicalGate
Merge branch 'trunk' into logicalGate
Merge branch 'trunk' into logicalGate
save transformation to gs. #167
Merge branch 'logicalGate' into trunk