0.6 documentation

[brson]

Some reminders of things I want documented for 0.6

In some comments on a previous commit people asked for the release notes to contain

• info about __morestack on ARM (not finished - Implement __morestack for ARM #5327)
• std::fileinput

The RELEASES.txt file also contains a number of TODO's for things I don't know about or that aren't finished.

Detailed release notes needs lots of additions

[brson]

Graydon also doesn't want them to mention the term 'linear'

[brson]

The borrowed pointer tutorial needs to be updated, and the FFI tutorial is really bad and could be possibly be augmented with some of the material from my recent blog post. The task tutorial needs to be updated, possibly with some of this

[brson]

core::comm and core::condition need docs

[brson]

#5486 #5416 #5011 #3804

[thestinger]

also #5533

[brson]

The discussion about core injection at the bottom of the tutorial is wrong.

[brson]

#3317 is also good

[brson]

example on rust-lang.org doesn't build

[steveklabnik]

Where's the source for rust-lang.org?

[brson]

@steveklabnik https://github.com/graydon/rust-www/tree/gh-pages

[brson]

Done as it's going to be.