Injectable and common theme.

[prasanna1211]

1. Color / font size / responsiveness theme should be uniform across all components.
2. A simple JSON / SASS file should be able to change that completely.

[prasanna1211]

The right way to do this would be using this plugin to inject the global theme. Let this issue be related to injecting the style alone. All other components should consume the injected variables in a separate issue.