Generate Manifest Refactor

The generate-manifest task has been refactored and breaks backwards compatibility. This really is for the better as it now supports all Cloud Foundry Manifest options. Another big change is that it no longer has any dependency on the artifact. This allows for the generate-manifest task to focus completely on manifest generation and not try to figure out what your artifact is.

Please take a look at the README for an example of the new syntax!

v0.1.0

renamed ARTIFACT_GLOB to CF_APP_PATH