v0.6.0-alpha+1: Update all components (#129)

• Add Material Icon.
• Deprecate GlyphComponent in favor of MaterialIconComponent.
• Update dependency to angular: 4.0.0-alpha+1.
• Material Checkbox: Add mixin for checkbox with no left margin.
• Material Chips: Add ability to specify background color for left icon.
• Material Expansionpanel: Add mixin to allow changes to panels without
  affecting nested panels.
• Material Input:
  • Add upper and lower bounds validators.
  • Re-calculate text length when custom character counter is set.
  • Prevent mirror-text overflow in multiline material input.
  • Remove unnecessary selector argument from mixins.
• Material Popup: Only set content removed if the popup is still not visible
  when the timer is finished.
• Material Radio:
  • Add mixin for radio button with no left margin.
  • Fix mixin to respect disabled status when a theme is applied.
• Material Select:
  • Fix MaterialSelectItemComponent to not cache the label.
  • Add input to material-dropdown-select to define custom a renderer for group
    labels.
  • Fix checkbox display handling and label padding in dropdown.
• Material Toggle: Set the attribute instead of the property to fix a bug with
  incorrect type, and not setting the right property.
• Material Tree:
  • Add ability to preserve expansion state.
  • Fix indentation of first child group.
  • Add input showDisabledCheckboxes.
  • Add a max-height mixin.
• Reorder List:
  • Update to recommended syntax for ngFor.
  • Migrate from ManagedZone to NgZone.
• Scorecard:
  • Replace deprecated Glyph with Material Icon.
  • Invoke inherited click handler from derived click handler.
• Avoid adding placeholder for deferred content if the element is detached.
• Selection Models:
  • Add deselect all option.
  • Add a limited filtering model.
  • Fix selectAll to only trigger a selection change event for the values
    that were added.
  • Add comparator as optional param to tree selection options for custom
    sorting.
• Updates to use metadata inheritance.
• Migrate away from comment-style generic syntax.
• Migrate stylesheet combinators /deep/ and >>> to ::ng-deep.
• Migrate away from use of angular's @View.
• Update animations to new Material specs.
• Update documentation.
• Remove unused library statements.