Renamed README.
Fixed links.
Moved version history out of README and insto own file.
Changed title.
Renamed release notes file.
Combined old release notes and version history.
Tweaked heading format.
Removed release notes section.
Removed old content and added getting started info + docs.

Note: old content got moved to bug #56.
Added a note about compile deps for the REPL.
Merge pull request #57 from oubiwann/fixup-readme

Fixup readme