Rust week of 2015-06-26

I removed a sentence that is not needed from Cargo documentation. I also added ability to read from $EMAIL environment variable to the cargo new command, and fixed a small issue in the test suite..

In the Rust tree:

• I fixed one oversight where someone missed removing some obsolete doc and annotations while they were removing obsolete code
• I fixed some bad code indents
• I added an example for reading from stdin
• I removed a misleading sentence
• I then fixed a typo