removed requirement that settings file have database, model, and run information. Now, only PFT is required
created separate settings package
merge with master
Merge branch 'master' into settings-pkg
updated settings package DESCRIPTION and moved to top level directory
added tests to settings-pkg
added settings package

Merge branch 'settings-pkg'

Conflicts:
	db/R/read.settings.R
	settings/R/read.settings.R
	settings/inst/tests/test.read.settings.R
	utils/R/read.settings.R