The Big Split - Content v. Code

Changes discussed in decause/hflossk#426

### Try it out!
```{bash}
git clone https://github.com/ryansb/hfoss-site.git
cd hfoss-site
hflossk run
```

### Make a new course!
```{bash}
mkdir otherfoss
cd otherfoss
# bootstrap an all-new HFOSS course, templates, static content, and everything else
hflossk new # That was easy
```

WIP:
* [x] `hflossk new` command
* [x] `hflossk run` command
* [x] `hflossk` command
* [x] Strip out HFOSS content and replace with templates
* [ ] Make a README that `hflossk new` will install to get new professors started
* [ ] Test on Windows
* [x] `hflossk openshift` command that will handle all openshift environment variables