KPM restore needs to be smart while restoring packages

[anandparanjape]

User Scenario:

• When user modifies Json file in VS for 'x' package and saves this file, output window shows "Attempting to resolve" all packages in the json file. User expects to see whether package being restored to the project or not.
• From commandline, if user run kpm restore, each time it tries to resolve dependencies and outputs log shows "attempting to resolve" information related to all packages which are there in the project.json.

Ask: kpm restore to be smart to check if project.json file is changed and restore only modified part. Force parameter can be added to kpm restore to forcefully update all packages in json file if needed.

Package Manager Log in VS will be cleaner with this enhancement.

[davidfowl]

It always has to try to resolve dependencies as any dependency added or removed can change the entire graph.

[anandparanjape]

Can we hide "Attemping to resolve dependency .. " behind verbose switch? this will make it much cleaner in tooling.

[davidfowl]

Yep, I'll close this as a dupe of #546