Updated net/http lessons to use first argument as listen port
Clarify the expected output

It was a little confusing to be asked to print out the list when a file per line was expected.
Merge pull request #53 from mrjoelkemp/patch-1

Clarify the expected output
Merge pull request #52 from Flet/time_server

Updated time_server to use first argument as listen port instead of 8000
updated deps
added CREDITS menu item
added gfm2html docs of problem dependencies
@0.3.0 lotsa fixes, dep upgrades, docs
clarify listen
added @Flet, updated workshopper dep
@0.3.1 fixed dep versions, added @Flet
Update problems to use path.extname over RegExp.

While regex traps like this are definitely essential to know, it seems
to cause much confusion and really isn't crucial to people's learning of
node.

path.extname simplifies this business a whole bunch and is probably
better practice anyway; it says exactly what it does and avoids the
possibility your regex is harboring "gotchas".

https://github.com/nodeschool/discussions/issues/91
https://github.com/nodeschool/discussions/issues/112
Update formatting.

Combines changes in https://github.com/rvagg/learnyounode/pull/55.
Merge pull request #56 from timoxley/path-vs-regex

Update problems to use path.extname over RegExp.