Add a sidebar with search and list of functions

[danielo515]

Hello,

I am really enjoying sanctuary, but the documentation is being very hard to navigate.
The main reason is because I have to scroll up and down all the time. I have to go to the top of the page to see the index, look for what I'm looking for and then click on the reference. This happens hundreds of times on a single day, and it's being exhausting. Specially when you are just starting.
On this regard ramda (and lodash) has made a terrific job on making the functions accesible. It's very easy and pleasant to navigate the documentation. Could something like this be added to sanctuary docs ?

Thanks in advance and keep up the good work.

[davidchambers]

I'm working on function search. I should have a pull request ready in a couple of days. :)