find misplaced records for NCDC;
skip grib records that dont have 7777 at end;
append "_ens" to ensemble variables
CFGridWrite : replace exisitin ACDD attributes; bug when existing atts are String valued.
CFGridWrite : replace exisitin ACDD attributes; bug when existing atts are String valued (2)
Allow unrecognized HDF5 messages - just log warning
make getBitMap public per request
CollectionGlob - first pass;
ReportPanel refactor
  bug in CDO putting wrong standard name, so check units first (!)
1. fix library defaulting in Nc4Iosp
2. fix // in url in opendapservlettest
Merge branch '4.5.0' of https://github.com/Unidata/thredds into 4.5.0
Fix url
Fix sizes of graphic point structures.

This fixes reading of Hail Index product, among others.
Provide more debug info
docs
Merge remote-tracking branch 'origin/4.5.0' into 4.5.0
WIP: Significant refactoring of sigmet reader.

Still working towards having better shaped vars. Significant movement of
code out of IOSP into volume scan class, since that was the only user.
Also moved a lot of date parsing to subroutines and use of CalendarDate.
WIP: More refactor of Sigmet IOSP.
WIP: Start trying to directly place rays.
WIP: Can open file, but still need to actually get data to vars.
WIP: Set variable specific object.