Bug fixes and button style tweaks

Updated button styles to better match MD spec for active states.

• #129 Fixed checkbox value not updating 03191d7
• #119 Fixed tabs following url after refresh 7b97d30
• #133 Fixed toolbar active class 2b3f583 (thanks @cailloumajor)
• Fixed a bug with v-click not properly applying 47cf0f7 (thanks @miquels)
• #138 Fixed outline styles 3595818
• #134 Added disabled prop to v-tab-item c0c7c31
• Fixed a bug where an expansion list state would not properly update 272f546
• Added more accurate method of applying event listeners fc392be