Create documentation

[kgerheiser]

Create documentation

Some ideas:

Quickstart

• source setup.sh
• create_env.py
• supported platforms

Setting up on a new system

• Finding compiler/modules

• Finding common external packages

  • spack external find

• Spack Mirrors/Caches

• Manually Configuring Compilers/versions

Workflow

• Installing a new package/version
• Uninstalling packages
• Modules

[climbfuji]

Nearly done! Next week I'll have the PR ready.

[climbfuji]

Progress towards this was made in #148 - once it's finalized for the first release, we can close this issue.

[climbfuji]

Closed via #233