Use GAlignments, new name for GappedAlignments.

git-svn-id: https://hedgehog.fhcrc.org/bioconductor/trunk/madman/Rpacks/ggbio@75525 bc3139a8-67e5-0310-9ffc-ced21a209358
Need to Suggests: vsn.

git-svn-id: https://hedgehog.fhcrc.org/bioconductor/trunk/madman/Rpacks/ggbio@75535 bc3139a8-67e5-0310-9ffc-ced21a209358