Multi-stage setup

[tsafin]

Cache-MDX2JSON is the special:

• the assumed scenario is to download first installer.xml
• then run some command;
• which will download the rest of files from GitHub (unauthorized anythow, thus quickly approaching the generic 60 requests a hour rate-limit);
• which then will be installed to their own namespace to be created;

This way we are unable to control all installed entities, and are unable to properly uninstall.

1. we need to figure out the way to check all installed objects
2. or make Cache-MDX2JSON to be CPM-aware (this is simpler)