The list of installed packages is properly updated
The list of installed packages is properly updated

Previously, the NugetWindow tried being optimal by managing it's own
installed packages list.  This caused issues when dependencies were
installed since the window has no idea what dependencies Nuget actually
installed.  Instead, the installed packages are now read directly from
the packages.config file whenever a major change takes place
(Install/Update/Downgrade).

GlitchEnzo/NuGetForUnity