check has been run; beginning diagnostics function; adding tests;
Merge branch 'master' of https://github.com/tbates/umx

# By tbates
# Via tbates
* 'master' of https://github.com/tbates/umx:
  more moves
  adding umxSummaryACE and umxPlotACE functions and support functions. This adds dzAr dzCr control, standardization, CI support to ACE models, and ability to print and plot them. Also ability to bound diagonals, and equate means
  making umx_grep work on things other than dataframes;  fixing help on umx_check; enhanced help for umx_cov
  saving a copy of the old umxACE function that was exported here for Elliot's paper
  bringing across tests for OpenMx that are not included there yet
  umx_check(); umx_object_as_string -> umx_objject_as_str detectCores instead of omxDetectCores;
  adding an onload message; also minor Rd improvement
  tests
  fixes for openmx 2; dropping openmx1 support umxSummary was not showing SEs with the new functions;
  umx_object_as_string utility