Create map of symbols to maps of tooltip paragraphs and clojuredocs links

[oakmac]

For each symbol it would be great to have:

• function signature (arities, types, etc)
• docstring
• examples
• related functions (clojuredocs "see also" concept)

[shaunlebron]

We can use clojure.tools.reader to get arities and docstrings from code, which I tried in cljs-pprint.

We can use the reader on ClojureScript function implementations found here:

• clojurescript/src/cljs/cljs/core.cljs
• clojurescript/src/cljs/clojure/set.cljs
• clojurescript/src/cljs/clojure/string.cljs

We can do the same for macros in the following files. Some macros are carried over from clojure, but some are reimplemented for clojurescript (most missing docstrings, so we should just use those from clojure when they're missing).

• clojurescript/src/clj/cljs/core.clj
• clojure/src/clojure/core.clj

[shaunlebron]

Not sure what to do about examples and related functions yet. It would be nice to use existing ones from clojuredocs and grimoire. @oakmac found these api links for clojuredocs:

• http://api.clojuredocs.org/
• https://github.com/dakrone/clojuredocs-client