Implemented ons-dialog
Added dialog-background-color variable to 'dialog' component.
Fixed some comments.
Added demo for dialog.
Fixes for ons-dialog. Transclude manually to enable ngController
directive.
Added modifier attribute to "ons-dialog".
Merge branch 'master' of https://github.com/OnsenUI/OnsenUI into feature-dialog

Conflicts:
	framework/directives/templates.js
Fixed status bar fill for ons-page inside dialog.
Updated demo.
Implemented getDeviceBackButtonHandler() method for "dialog" component.
Updated changelog.
Merge branch 'master' of https://github.com/OnsenUI/OnsenUI into feature-dialog

Conflicts:
	CHANGELOG.md
	framework/css/common.css
	framework/directives/templates.js
	framework/js/onsen.js
Added "no-status-bar-fill" directive to ons-dialog.
Use child selector instead of descendant selector.
Merge pull request #289 from argelius/feature-dialog

Dialog component