Release 0.10

This release focused on improving the selection of graph elements in general and the shapes of class diagram elements.

• Shapes The look of class and interface nodes has been improved. Now
  empty sections are not shown, and the node's name is centered, which
  makes interfaces and stereotypes look better.
• Selection When a package node is copied, any edge between nodes contained in the
  package are also copied, even if they are not selected.
• Selection The multi-selection feature (selecting multiple elements with the
  Ctrl-key pressed) has been fixed.
• Selection Selecting a creation tool in the context-menu no longer creates a node
  at the same time. The context menu now behaves like the tool bar so
  selecting a tool only makes the tool active.
• Pasting The non-atomic pasting operation for groups of elements was fixed and
  made atomic. If a group of elements is copied and pasted, undoing the
  paste operation will remove all the elements in the group.
• Refactoring The ClassNode and InterfaceNode classes have been reorganized and the Graph.connect method has been cleaned up and made more general.