simplify implementation of R.reverse
rename R.size and handle null/undefined argument
rename some *With functions to *By
Merge pull request #547 from davidchambers/rename

rename some *With functions to *By
xyz@0.5.x
Merge pull request #551 from davidchambers/xyz

xyz@0.5.x
Version 0.8.0
fix remaining private function docs [ci skip]
simplify semantics of R.isEmpty
Merge pull request #540 from davidchambers/is-empty

simplify semantics of R.isEmpty
Merge pull request #542 from davidchambers/reverse

simplify implementation of R.reverse
Merge pull request #541 from davidchambers/length

rename R.size and handle null/undefined argument
clean up @return documentation
Merge pull request #557 from kedashoe/doc-fixes

clean up @return documentation
fix categorization of R.if
Merge pull request #558 from davidchambers/if

fix categorization of R.if