rplos_vignette: fix two typos
README.md: fix one typo
fix same typos in vignettes/rplos_vignette.Rmd
added install tm pkg to appveyor file
Merge pull request #70 from kbroman/typos

A few typos: in Readme and in vignette
Merge branch 'master' of https://github.com/ropensci/rplos
removed margins.sty file
updated Makefile, now asks for API key on make command, #71
this may not be a the best approach....
bumped date and version number