improving FileSystemDriver.writeToFile method
adding error log in FileSystemDriver.readFromFile method.
add copyFile method to FileSystemDriver.
adding copyFile to Editor FileSystem kernel module
create metadata model
create objects collection
create settings model
cleanup
adding objects collection to screen model
use UUID.v4() for object model id
add support for openning dahu screencast project.

- added screencast model helper methods for importing old dahu screencast file
- added screencast model helper methods for checking model version
- add support for openning a dahu screencast project
changed working version to 0.0.4