Jewel UI Set initial work

[carlosrovira]

Jewel is a new UI Set for Apache Royale.

This issue covers:

• Initial set of components:
  Label, Button, TextButton, TextField, CheckBox, RadioButton, Alert, Headings And Text
• Slider is a work in progress
• Some new Layouts based mainly in CSS (work in progress)
• Jewel supports themes.
• JewelTheme is the Master theme project and uses SASS syntax and compilation to generate final CSS themes. As well supports 12 Colors, Light/Dark and Flat/NoFlat. Changes in this theme SASS rules will affect the rest of "child" theme projects
• Final Themes based on JewelTheme as created in themes folder and its CSS precompiled to use directly in Royale projects that uses Jewel UI Set (this is a work in progress)

[carlosrovira]

Closed with commit 0fa5b17