New install script

[garrettrowell]

Summary

This started by me attempting to fix setting choco_install_location to a path containing a space, ex: C:/Program Data/chocolatey

Ultimately this resulted in reworking install.pp to use the new install script. The documented script can be found here: https://community.chocolatey.org/install.ps1

The new install script primarily uses environment variables to customize behavior, but required slight modification in order to customize the 7zip download url. Thus the [SIG] block provided by chocolatey was removed.

The biggest change in behavior for this module is no longer managing the installation of 7zip. The new script uses built-in powershell cmdlets to extract the nupkg assuming powershell 5+, which in all fairness should be the majority of users. If powershell < 5 detected, the install script is still able to download and install 7zip if needed.

Related Issues (if any)

• Upcoming major releases of Chocolatey products that may impact functionality on the module #321

Checklist

• 🟢 Spec tests.
• 🟢 Acceptance tests.
• Manually verified. (For example puppet apply)