updating read.output, wrote tests, refs redmine #1731
merged branch "ed-ncvars"

Merge branch 'ed-ncvars' into model2netcdf

Conflicts:
	utils/data/mstmip_vars.csv
added example sipnet output
moved approx.posterior function to meta.analysis module, rather than adding a dependency on PEcAn.priors to the PEcAn.utils module (the function requires PEcAn.priors::fitdistr)
fixes redmine #1561 by fixing and renabling tests in the PEcAn.utils package; only the logger functions in utils/inst/tests/test.logger.R don't seem to work, (I have updated the issue with more details)
continuting revisions of the model2netcdf functions and documentation
updated meta.analysis documentation
uncommented tests / removed obsolete tests from test.read.settings; re-added RMySQL dependency
added default database settings so that check.settings will not fail if not specified
removed requirement that settings file have database, model, and run information. Now, only PFT is required
added read.settings to test.read.settings
fixed final bug in model2netcdf.BIOCRO

Merge branch 'settings_defaultdb' into model2netcdf

Conflicts:
	utils/R/read.settings.R
	utils/inst/tests/test.logger.R
	utils/inst/tests/test.read.output.R
	utils/inst/tests/test.read.settings.R
	utils/man/read.output.Rd
	utils/man/read.outputs.Rd
additional changes to move functions from utils to priors module
merged recent updates from master
added data to meta-analysis module for use in developing statistical model
updated check.settings to set bety$write = FALSE if is.null(settings$database)

Merge branch 'master' into model2netcdf

Conflicts:
	utils/R/read.settings.R
updated documentation after recent merge; moving functions from utils -> priors