Coordinated METplus Version 3.0

Release notes are followed by the GitHub issue number which describes the bugfix:

https://github.com/NCAR/MET/milestone/65?closed=1

Bugfixes Included:

• Fix Ensemble-Stat runtime error when requesting only RHIST, PHIST, or RELP output line types (#1342).
• Fix Grid-Stat to support MAXGAUSS smoothing method (#1335).
• Check for bad data when computing the Gerrity Score (#1335).
• Fix ascii2nc to compile without support for Python embedding (#1335).
• Correct omissions in the MET User's Guide (#1335).