v0.7.1: Add Material Auto Suggest Input component (#164)

• Material Checkbox: Fix disabled state to match material-spec which is a light
  grey not a certain opacity of the checkbox.
• Material Chips: Add high density mixin.
• Material Input:
  • Add selectAll function for calling the underlying input element's select
    method that focuses the input and selects all its content.
  • Add ability to update the data on a change instead of keypress or blur for
    the standard Material Input.
  • Remove error color from floating label to conform to material spec.
• Material Popup:
  • Fix mismatch between the variable used as a reference point for
    repositioning the popup and the variable used to initially set the popup's
    position. This caused issues when the tab was in the background because
    these variables could have changed significantly before the next animation
    frame fired (since requestAnimationFrame is throttled when the tab isn't
    visible).
  • Use _sourceDimensions instead of layoutRects[1] to take overlay
    container offset into account. Using popupSourceLayoutStream directly
    caused issues when the .acx-overlay-container offset was not (0, 0).
• Material Select: Fix orientation when groups are used.
• Scorecard:
  • Fix styling for extra-big cards.
  • Fix to allow selectable scorecards in a "custom" scoreboard.
  • Add a tooltip field enabling scenarios where more information about the
    value can be displayed.
• Theme: Prepare dark theme for upcoming Visibility.None change.
• Cleanup unused fields.
• Update default material scrollbar width to 8px. This is easier to use with a
  mouse or touch input compared to the previous default of 4px.
• Cleanup unused styles and reorganize .scss files.
• Remove link hover style.
• Migrate uses of ElementRef to Element.
• Remove visibility: Visibility.none from all components since compatibility
  is not yet fully supported. Will be added in an upcoming release.
• Update documentation.