merge from git

git-svn-id: https://hedgehog.fhcrc.org/bioconductor/trunk/madman/Rpacks/ncdfFlow@75946 bc3139a8-67e5-0310-9ffc-ced21a209358
1.deprecate R APIs:ncdfFlowSet_sync and ncdfFlowSet_open 2. remove isSaveMetaData flag from ncdfFlowSet constructor (which means it is always FALSE) due to #1 and #12.
Merge commit 'be822c3511be18127fadb1dc14628499d3fd54f2' into trunk