Cache is stored in roaming profile instead of locallow or local

[BrianL-STCU]

The .NET package cache is stored in %APPDATA%\.csharprepl\packages, which maps to within the roaming profile, which is synchronized to the domain. This can be extremely slow on some connections (mine is currently 816 MB, dragged over DSL every day), and isn't really the intent of the roaming profile. %LOCALAPPDATA%\.csharprepl\packages or %USERPROFILE%\AppData\LocalLow\.csharprepl\packages would be more idiomatic and efficient.

Thank you for this project!