Added support for reactive forms, validation & disabled state

[GFoley83]

• Added support for reactive forms with validation and example.
• Upgraded to Angular CLI 1.2.0.
• Fixed Hexadecimal validator registration and added support for reactive form validation usage.
• Extended validation messages for min and maxlength to include the requested length in error.
• Added additional unit tests for reactive forms.
• Added support for disabled state when using template or reactive forms.

[ronen1malka]

Very important addition! Thanks Gavin!