Feature Request: `opm dist-install`

It would be nice if there were a way to install a dist file (as built by opm build)

• It would be much easier for local testing by module authors, before uploading to server
• It would allow for offline caching of dists, which is useful for testing and build scripts

It would also be nice if the output of opm build included the name of the distribution file that was just built.

i imagine the syntax could be something like:

 cd lua-resty-example
 opm build
 > found license: MIT license.
 > Package lua-resty-http-0.10 already installed.
 > a lua-resty-example-0.1
 > a lua-resty-example-0.1/dist.ini
 > a lua-resty-example-0.1/lib
 > a lua-resty-example-0.1/README.md
 > a lua-resty-example-0.1/lib/example
 > a lua-resty-example-0.1/lib/example/main.lua
 > Created distribution: lua-resty-example-0.1.tar.gz
 opm dist-install lua-resty-example-0.1.tar.gz

Start by tracing the CLI entry points for opm build and package installation. Add the requested opm dist-install flow for a built distribution and report the created filename from opm build; done means local and offline installation works from the generated archive and the output names that archive.