Add comments to some classes in Helios-Browser
Merge pull request #513 from johnnyt/helios-browser-comments

Add comments to some classes in Helios-Browser
Make server URL clickable in iTerm

iTerm doesn't recognize URLs unless they start with an explicit http://
I did some drive-by recategorization in Repl class, too.
Merge pull request #514 from cdlm/say-http

Make server URL clickable in iTerm
amberc: add help output for the '-D' flag
fix for Set >> #add:
Add a favicon

I took the image from amber-lang.net and removed the reflection; then I
used http://www.favicon.cc to generate the favicon.
Merge pull request #518 from kpullen/add-favicon

Add a favicon
Merge pull request #517 from mkroehnert/compiler

amberc: add help output for the '-D' flag
Fixes issue #519