MBS Filemaker Plugin, version 2.7pr2

New in this prerelease of the 2.7 plugins:

Added FileDialog functions.
Added Preferences.SetValue and Preferences.SetValue functions.
Added Files.DirectoryExists, Files.FileExists and Files.ItemExists functions.
Added PDFKit.Watermark function.
Fixed GraphicsMagick functions to no longer crash if you call them with Destroyed image reference.
Improved Drag and Drop. You can now specify email and receive email drags from Apple Mail.
Added CoreLocation functions to query location of a Mac.
Implemented Path.NativePathToFilemakerPath and Path.FilemakerPathToNativePath for Windows.