merged pathogen since it is the default decoder

git@github.com:ekashida/yui-pathogen-decoder.git
use simpleDecoder as default
remove support for path groups

Path groups are replaced by groups that consist of a root path and a
list of relative paths.

Commenting out tests that will be recycled with the introduction of
shifter group types.
simplify by removing decoder lookup object
remove application-specific modules
refactor pathogen decoder

- tests rewritten using vows
- replace `root` module group type with `shifter` since it better
  represents custom yui modules that were built using shifter
- replace `path` module group type with generic "fullpath" (single
  subgroup) and "relative path" (two subgroups: root and module list)
  group types that don't have type names
refactor validate

- pass status code as a property on the error
lint before testing