Paper input

[DanChadwick]

Convert paper-input to ember-paper 1.0 standards.

• Convert to ember-paper 1.0 coding standards.
• Convert validation to computed properties.
• Unify internal validations, custom validations, and external validation messages.
• Support displaying multiple validations at once a la Angular Material 2.0.
• Support the required asterisk a la Angular Material 2.0.
• Fix the display of inputs with an icon on the left.
• Change the passing of passthru attributes from attr- to passThru.
• Change focus in/out events to require action closures.
• Numerous improvement to the dummy app documentation page.
• Allow required asterisk styling without required validation (useful for external validation messages that implement required validation). required="style" sets only the styling, but performs no validation. If the html5 required attribute is desired instead, use passThru.
• Update documentation page for change to passThru attributes.
• Update tests for API changes.
• Document API changes in CHANGELOG.md

[DanChadwick]

Test failures are due to paper-dialog, not this PR.

[miguelcobain]

BaseFocusable handles this. Also, focus isn't used anymore. BaseFocusable uses focused.

[miguelcobain]

icon-class should be camelCased, correct?

[miguelcobain]

isArray already tests that validationErrors is truthy.

[miguelcobain]

• Use icon="iconName" to include a left icon and iconRight="iconName" to include a right icon.
• Use md-has-icon class when one of them is present (computed.or('icon','iconRight'))
• Add md-icon-right class when iconRight is present

[DanChadwick]

All set, but note that no-float applies to the label, not the container or icon. It prevents the label from floating up when you start to enter text. See the revised dummy app.

[miguelcobain]

Closed in favor of #326