Gowut v0.7.0 public release

Changes and new features in v0.7.0:

• A new example application: "Showcase of Features".
  The application is written using Gowut (of course) and showcases the component library.
  You can start it by typing (from the root of your GOPATH):

  go run src/code.google.com/p/gowut/examples/showcase.go
  

• New component: Expander
Expander shows and hides a content component when clicking on the header component.

• A new TableView interface which defines methods associated with a component rendered into a table.
  Allows changing border, cell spacing, cell padding and default horizontal and vertical alignment for example.
  Used for: Panel, Table, TabPanel (and TabBar)

• Added many new methods and constants to the style builder.

• Panel improvements:

  • Constructors to create panels initialized with a different layout, e.g. NewHorizontalPanel().
  • New helper methods to add space consumer components.
  • New methods as part of the TableView.

• Changed CSS styles (beautified) of many components.

• CheckBox and RadioButton now have additional style classes for the disabled state.

• "Mass" code optimization.

• Other minor changes, improvements and bug fixes.