Removed autocomplete from son as its not part of the XS addin
Added 4.5 target framework versions
Added F#3.0/31. targets for test project (this fixes windows builds that don't have 3.1)
Updated target framework to 4.5 use standard bin/debug paths
added standard path for nuget in son
Updated build scripts to do nuget restore on sln

On windows the test project was in a sub folder and project based
restore was refusing to work.
Remove unneeded debug folder copy
Added 4.5 target framework to FSharp.AutoComplete
Merge pull request #574 from 7sharp9/buildimprovements

Improvements to the build process