Standard library documentation is outdated

[kud1ing]

See for example: http://www.rust-lang.org/doc/std/files/list-rs.html
The functions "car" and "cdr" were renamed to "head" and "tail" some time ago.

I suggest the following:

1. add a update time-stamp or a version number to the created files
2. update the documentation regularily

[brson]

I've updated the documentation. Haven't done a timestamp. We'll want to take another pass at the docs before 0.1.

[kud1ing]

Ok, thanks.

[kud1ing]

graydon:btw. docs on the website now auto-update from source every time linux2 does a successful build on master

Probably fixed, seems to be working.