removed assertthat from pkg, fix #79
updated all man pages for new roxygen2 pkg ver
rbuildignore readme.rmd
fixed journalnamekey test
fixed plosabstract test
dont ignore tests
fixed plosauthor test
fixed plosfigtabcaps test
fixed plossubject test
fixed plostitle test
fixed searchplos test
fixed missing new lines in two man-roxygen files