2.0 API Changes

Dynamic Theming (Thanks @BenDol)

• Shorten the Module Name of each themes
  • <inherits name="...GwtMaterialThemeBlue" /> -> <inherits name="...ThemeBlue" />
• Split Theme resources
• Support Dynamic Theming
• Remove each font imports on each themes, as GMD Basic Resources imported it initially.
• Fixed Param toolbarColor of Window Ignored #552
• Fixed Theme issue on ComboBox multiple select #15