Removed unnecessary dbSNP big-table dependency.  Ti/Tv is now required.  Consistent downsampling level for all programs.  Spelling corrections.  VariantEval now generates R-style output.
Removed unnecessary dbSNP big-table dependency.  Ti/Tv is now required.  Consistent downsampling level for all programs.  Spelling corrections.  VariantEval now generates R-style output.

git-svn-id: 4561c0a8f080806b19201efb9525134c00b76d40@4355 348d0f76-0448-11de-a6fe-93d51630548a

iontorrent/Torrent-Variant-Caller-stable,iontorrent/Torrent-Variant-Caller-stable,iontorrent/Torrent-Variant-Caller-stable,iontorrent/Torrent-Variant-Caller-stable,iontorrent/Torrent-Variant-Caller-stable,iontorrent/Torrent-Variant-Caller-stable,iontorrent/Torrent-Variant-Caller-stable,iontorrent/Torrent-Variant-Caller-stable