Introprog Scala Library version 0.1.1

In addition to bug fixes this pre-release includes:

• Refactor event types to have integer representation.
• Add show-function for converting integer events to a descriptive string.
• Add Dialog functions, including color chooser.
• Update examples.

Introprog Scala Library version 0.1.0

Includes a documented version of PixelWindow with both a Swing and a JavaFX implementation for testing purposes.