Add missing comma in citation
Remove built vignette from Git
Move vignette for R 3.0
Minor fixes to DESCRIPTION file
Don't run some examples; see notes

Windows builder doesn't seem to play nicely with nls formulas.
Need to investigate further. Also causing a problem in vignette.
Reduce required R version

May be temporary, but I see no reason why this shouldn't
also work with R 3.1.1