First CESM2.0 release tag, identical to mosart1_0_31

Science changes since: mosart1_0_00

• Changes from Sean Swenson to add minimum value to rlen
• Update areas on routing file
• Answer changing improvements to channel storage from HongYi Li for faster spinup.
• Bugfix from Tony Craig to use correct delta time for qgwl flux.
• Treat irrigation as a seperate flux
• bugfix for budget diagnostic output
• bugfix: calculation of qgwl_volume must be multiplied by ar
• Update default routing file.
• New method of handeling runoff terms to avoid negative runoff.
• switch to input dataset MOSART_Global_half_20151130a.nc
• update direct sparse matrix to include non basin points in order
  to pass data from any grid cell directly to the ocean.
• modify the direct term and push all direct water to outlet points
• set all tracer 2 water (frozen water) to be a direct term
• add ability to skip some tracers in the euler solver via euler_calc flag
• add a budget accumulator term
• Fix exact restart in atan slope calc
• Swenson bugfix for mosart direction file
• Swenson river volume normalization bugf

Software changes since: mosart1_0_00

• Add config_archive for mosart
• delete rof_comp_esmf
• add model_doi_url,
• change some instances of RTM/CLM in documentation to MOSART
• Update testlist to version 2 format, remove ys tests
• Upgrade config_component to version 3
• allow output file format to change
• If NINST_ROF > 1, check if instance number in name for REFCASE
• Update testlist and use Clm5 compset names
• Update routing file
• Update to cime5 python namelist infrastructure
• Fix an issue with nag, lower amount of log output
• Add output frequency to history files
• Turn off for CLM_ACCELERATED_SPINUP="on"
• Add new namelist options bypass_routing_option,
  qgwl_runoff_option
• Error checking on max length of history filenames.
• Add testdefs dir, testmods and testlist for integration to cime
  test system.
• remove rofdto from coupler interface fields.
• Changes to get Mosart to build with Nag on Hobart
• merge ACME fixes to decomp and performance
• cime compatible infrastructure
• Add direct to ocean runoff flux
• PIO2 updates