Update repo for rust 0.11-pre

Libc moved to its own crate, arrays indexed with uint's instead of i8.
Check file write result (removes compiler warning)
Add simple webserver example (uses std::io::net)
Convert filenames to relative file links (Github)
Fix file links again (remove quote marks)
Add letter frequency solution

The program letter_frequency counts occurences of each letter in some
file. It uses collections::HashMap for gathering statistics.
Add writing to standard error stream example
Add integer sort solution
Add binary dir to .gitignore file
Merge pull request #34 from JIghtuse/to_hoverbear

Sync with my repo
Add Artithmetic/Integer exemple
Add averages mean angle exemple
Add arithmetic mean calculation solution

This one is duplicated because previous one was not appeared at
rosettacode and I take it.
Add binary digits printing solution
Add solution for floating point infinity task
Merge pull request #35 from JIghtuse/to_hoverbear

Add few more examples
Merge branch 'master' of https://github.com/Hoverbear/rust-rosetta

Conflicts:
	README.md
Merge pull request #36 from nbarbey/master

Two new exemples