started examples of taylor diagrams
new.taylor function
change of taylor
taylor finished

Merge branch 'master' of github.com:jingxia/pecan

Conflicts:
	qaqc/R/taylor.plot.R
	qaqc/inst/extdata/extdata.R
	qaqc/inst/test/test.taylor.plot.R
updated read.output so that it will run even if model-generated output is not present; also added 'require' to load model-specific package if not already loaded
vignettes
Merge branch 'master' of https://github.com/jingxia/pecan
Merge
removed email confirmation of database existance
Merge branch 'master' of github.com:PecanProject/pecan