Merge pull request #266 from Ramda/master

yet more jsdocs [ci-skip]
Merge pull request #268 from Ramda/master

fix func
throw if R.func is called with no arguments
Throw when prop is called without arguments.
Merge pull request #271 from fson/prop-without-args

Throw when prop is called without arguments
Merge pull request #269 from davidchambers/func

throw if R.func is called with no arguments