Add templated dep section from the readme.
Update the installation instructions.

More explanations, manual install & removal instructions, and some
redundant bits merged together.
Add some more notes about form in the overview.

Maybe a bit repetetive; I can fix that later.
Add a note about OS support to overview, from the readme.
More and clearer explanations about basic commandline usage.
Every subcommand has a unique first letter now. Abbrev pls.
Some basic console examples.
Add some info on running deps from the readme.
Add some notes from a readme dep example.
Add an example running Cucumber.tmbundle, from the readme.
Lots more docs on dep sources -- some from the readme, some new.
A wording tweak.
Add a note about dep requirements and context.