Enhance: detect HTTP proxy configuration.
from environment variables, and NuGet configurations.
Fix: install/uninstall process crash at "Add-Type 'Microsoft.Build'".
Specify full qualify name.
Merge branch 'fix/fail-at-addtype-msbuild' into enhance/http-proxy-config
Fix: ignore upper/lower case in nuget configuration entry name.
Update documents.
Fix readme.md layout.
Merge branch 'enhance/http-proxy-config'