Merge pull request #1 from mitchmindtree/master

Initial PR of pitch_calc src along with an example
Merge pull request #2 from mitchmindtree/master

Corrected example link, added comments to example
remove redundant Cargo.toml section

This is the default, so no need
Merge pull request #4 from steveklabnik/master

remove redundant Cargo.toml section
Merge remote-tracking branch 'upstream/master'
Updated to latest rustc and incremented version