Support custom installation path

[xiaoyao9184]

Sharing node sdk across users

Custom installation location for NVS or nodejs sdk

Use the existing environment variable NVS_HOME when installing

[jasongin]

You can install the nvs scripts to a shared location and give all users read+execute privileges. Then each user must still have their NVS_HOME variable pointing to a private location for that user, where node binaries are downloaded and other user state is stored.

[xiaoyao9184]

@jasongin i am using choco on windows system, after installed i move %LOCALAPPDATA%\nvs\node to other location replace it use mklink with junction opt

[jasongin]

I don't know much about the choco installer; @molant contributed that.