merge from git

git-svn-id: https://hedgehog.fhcrc.org/bioconductor/trunk/madman/Rpacks/flowWorkspace@73872 bc3139a8-67e5-0310-9ffc-ced21a209358
bump version
Merge commit '3546a6e43a8fcb9862452f8b7a68334334dfcf54' into trunk
change the shape and color of graph node in plot method for GatinghierarchyInternal
made changes to methods [,[[, getSamples so that they only use the sampleNames from pData of fs. close #69
close#68
fix some bug in ncFlowSet API due to the enhancement made to address #69
fix a typo