prepare a CRAN release

prepare a CRAN release

final bump version

add a blog post and a book

bump version and prepare a CRAN release

bump version, and prepare the CRAN release of knitr 1.7

bump version for CRAN release knitr v1.6

version 1.5 for CRAN, and start praying...

Bears!!

Greg @gfinak said this would be my last GIT commit message if I push to Github in Alaska, since I'll be there for vacation for the next week. Let's see if he is right. I hope not, of course.

Anyway, this is knitr v1.4, and I start to pray CRAN masters won't bite me. Well, it is way better for them to bite me rather than bears biting me in Alaska.