Added explanation to login page.
Wrote a Quick Start

This is for developers, volunteers, and people who can run Scramble
servers.

The "quick start" for users should be built into the site, so that
they can learn as they go without extra effort.
Added FAQ
Fixed Makefile, create downloadable binary
Improve Quickstart. Fix #17
Better key derivation: PBKDF2
Verify recipient public keys
Ran gofmt
Replaced PBKDF2 with Scrypt
Updated README with new links