Merge pull request #30 from JIghtuse/master

Add example of work with complex numbers
add loops/for example
add loops/foreach example
add loops/infinite example
add loops/n_plus_one_half example
add loops/while example
Merge pull request #31 from jschaf/loops

Add loop examples
Add almost prime example.

This is a translation from the C code.
fix compilation error for sqrt method call
Merge pull request #33 from jschaf/sieve_sqrt

fix compilation error for sqrt method call
Merge pull request #32 from nbarbey/master

Add almost prime example.
Fix README icon and project path to show my repo
Update repo for rust 0.11-pre

Libc moved to its own crate, arrays indexed with uint's instead of i8.