[3.0] Optimize sync of project

[HakanL]

My project is about 100 MB, it would be neat to have a way where VsLinuxDebug would only copy over modified files instead of delete and transfer the whole package.

[DamianSuess]

I agree with this request as a new feature. Unfortunately, it was cut from scope in the v1.x release.

You may be pleased to know, in the v2.0 release, more async operations (#40) are being performed so that Visual Studio does not freeze. The biggest bottleneck was the uploading of the deployment package.