Use standard output path

[jeroens]

Both core and UI should write outputs to a shared, user configurable path. The default path should be [model directory]/[model name]

[jeroens]

Added Options dialog interface to configure standard output path

[jeroens]

Behaviour in the Scientific Interface is now as follows:

• User selects a output path mask in Options interface
• This path is passed on to the core on the following occasions:
  • Whenever settings are initially loaded - this ensures that the core has a default output path at all times
  • Whenever a model is loaded - this ensures that the path resets when a model is loaded just in case the path depends on the model directory
  • Whenever settings are modified
• File interaction dialog behaviour is updated too:
  • Generic file interaction dialogs are reset to the core path when a model is loaded, and from then on keep using the last accessed directory.
  • Model load or save file interaction dialogs remember the last used model directory.

[jeroens]

This issue will be on-going. Added an entry in the EwE programming forum, should also be mentioned in Wiki