Merge pull request #261 from Ramda/master

more docs [ci-skip]
Fix some examples using wrong names for functions
Fix incorrect function name of sortBy
Merge pull request #262 from fson/fix-examples

Fix function names in examples
Add constructN

Constructor wrapper for variadic constructors.
Add a note about construct/constructN and Date
Merge pull request #264 from fson/constructn

Add `constructN`