Release v0.1.1

Now supports building sequence and activity diagrams with a simpler API
(without needing to create an ImageSource)

First pre-release

Supports generating images of:

• Sequence diagrams (with simple messages)
• Activity diagrams (with initial/final nodes, decision/merge nodes, actions and control flow)

Supports constraint checking.
You need the core, sequence, activity and image jar in order to run diagrams as code.