Split up the modules into commands and schemes

This segmentation allows gerrit-review to partially install the plugin,
using only the DownloadCommandsModule. Since the server has exactly one
URL the SchemeModule is not required and adds unnecessary complexity.

Change-Id: I1e64902ee2b2d0dd2be3233c5ebb16427841d2ae
3 files changed
tree: e88a7e621ee7ae53917a1088a4dc75204a5f8aae
  1. src/
  2. BUCK