headpin-lib-cli - remove env edit commands from headpin
core/ram subs - displaying subscriptions limits

``` bash
$ katello <auth> org subscriptions --name acme
```
pass in installed products on register
Merge pull request #28 from beav/add-installed-product

pass in installed products on register
Merge pull request #27 from komidore64/cores-yo

core/ram subs - displaying subscriptions limits
Merge pull request #26 from thomasmckay/headpin-lib-cli

headpin-lib-cli - remove env edit commands from headpin
Updating README

Updating README to remove dupe information and pointing people to main
Katello README instead.
Merge pull request #29 from daviddavis/readme-update

Updating README
Cleaning up and fixing setup.py
Merge pull request #30 from daviddavis/temp_1369061847

Cleaning up and fixing setup.py