Fix broken links to R packages book
Update README.md
Merge pull request #155 from jennybc/patch-1

Fix broken links to R packages book
fix build warning: \em doesn't seem to be valid Rd
remove ligature
Merge pull request #161 from krlmlr/trivial-doc

fix build warnings concerning package documentation
use union merge driver for NEWS.md
Only use all.equal if identical is FALSE.
Closes #165
Renable random praise. Closes #164
Upgrade roxygen
Move methods to depends. Closes #123
Merge pull request #163 from krlmlr/union-merge

use union merge driver for NEWS.md