Merge pull request #781 from swirldev/dev

Swirl 2.4.5

Merge pull request #752 from swirldev/debian-clang-encoding-error

Debian clang encoding error

Merge pull request #599 from swirldev/dev

swirl 2.4.3

Merge pull request #497 from swirldev/dev

Update to 2.4.2

Delete .Rapp.history

Merge pull request #435 from swirldev/dev

Update master to 2.4.0

update NEWS for 2.2.21

increment version to 2.2.16

increment version for typo patch

add cran-comments.md to appease new devtools::release()