Rename package to gosteno

* this now complies with golang package naming conventions
* it allows clients to use gosteno without having to rename it to steno

Signed-off-by: Alex Jackson <ajackson@pivotallabs.com>
Remove outdated config parameter from README

Signed-off-by: Alex Jackson <ajackson@pivotallabs.com>
Merge pull request #1 from cloudfoundry/fix_package_name

Fix package name