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Merge branch 'master' of https://github.com/tbates/umx

# By tbates
# Via tbates
* 'master' of https://github.com/tbates/umx:
  minro changes around umxPath and file renaming
  reorg for handling ordinal variables; umx_means to work with factor columns (mean = 0); umx

Conflicts:
	man/umx_cov_diag.Rd