Prefer async IO operations
Allow configurable FileSystem for caching
Write to cache at the FS root directory
Allow file system cache to be set in Razor*
* S&box doesn't seem to call SetPropertyObject right now. Instead it just ToStrings everything and sends it through SetProperty so this won't actually function until that's fixed.
Merge branch 'master' into peter-r-g/fs-changes
Fix build error
Move cache FS to a library options class
Merge branch 'master' into peter-r-g/fs-changes
Merge pull request #3 from peter-r-g/peter-r-g/fs-changes
FileSystem cache changes