v0.6.0: Update all components (#153)

• Update dependency to angular: ^4.0.0.
• App Layout: Fix margins for header icons/links.
• Material Button: Refactor raised styling so it can be used in a mixin.
• Material Input: Add support for material dark theme.
• Material Popup:
  • Constrain popups to the viewport if both enforceSpaceConstraints and
    overlayRepositionLoop are enabled.
  • Create the material-popup view synchronously.
  • Remove animationComplete event.
• Add missing MaterialIconComponent, MaterialPersistentDrawerDirective,
  MaterialTemporaryDrawerDirective, and MaterialSelectSearchboxComponent to
  materialDirectives.
• Change DisplayNameDirective to a functional directive.
• Additional styling cleanup to support ng-deep.
• Reduce visibility of common directives/components for smaller code size and
  better performance.
• Refactor Angular annotations to inline versions.
• Update documentation.