correct the shiny package author for write_bib()
lower case manual and book
there is no uncertainty abou the author, so just put the name there
omitted a period in the title
add another citation entry http://www.crcpress.com/product/isbn/9781466561595
protect {R} to avoid lower case in bibtex
I do not remember why I had to use ([^{]|$) here; is there another source for \\textbackslash? seems the answer is no; the only way to produce it is through escaping the baskslash

http://cos.name/cn/topic/109774
add the `quiet` argument per request of Vince Buffalo
add quiet to the vignette functions as well
roxygenize
omitted a comma
break the long line in citation