Rename sprinter_prepend_path -> __sprinter_prepend_path.
Add __sprinter_remove_path function to utils.sh.
Merge pull request #37 from evocateur/feature/path-utilities

Improved path utilities
upgrading to bootstrap w/ virtualenv
removing dead method
Added more verbose manifest error handling, fixes #36
fixing environment test hanging on prompt
Merge branch 'develop'
using a cleaned requests, ignoring netrc
adding a new test to show desired behaviour
starting some work on refactoring inputs
still broken, but a major refactor is underway
Moving tests around
removing singleton
migrating lib_tests
moving packages to an external directory
refactoring and moving code
migrating larger functionality over to core
moving more tests around
moving around some more