lowercase

# actionHero is renamed to actionhero (lowercase)

In order to satisfy NPM's requirement that all packages be named in lowercase, all new versions of actionhero, starting with v7.6.0 will be named `actionhero`.  actionhero was fortunate enough to be "grandfathered" into NPM's naming conventions, but stricter requirements on new versions of NPM will require a lowercase name. 

In order to not break compatibility with existing projects, both `actionHero` (old) and `actionhero` will be up in the NPM repository for a few months.  CHANGE YOUR PROJECTS NOW, as the old `actionHero` project will be deleted in the near future.

### notes
- `actionhero` is now the name of the node binary
- `actionheroClient` is now the name of the frontend JS client, and it is included with `actionheroClient.js`