Feature: Progress Linear/Circular Component

[peec]

This PR gives 2 new components:

• Progress Circular
• Progress Linear

These works just like ember-material-design.

Converted from http://mike1234.com/ember-material-design/ ( Thanks @mike1o1 ).

Notes:

• Added Sniffer service. Also added a modified service of "constants", named "browser-compatibility" which is used by the linear progress component. A service fits very well for this purpose because the detection only needs to be done once and not per component basis. So I also added these services which the progress-linear component needs to create dynamic transforms attribute on the DOM.

[peec]

@miguelcobain This PR ( progress-linear ) is now the only thing left before autocomplete #132 is done. This PR implemented as ember-material-design. Could you take a look and possibly merge this when you have time?

[peec]

@miguelcobain I see that progress-linear is now merged, thanks. I did some changes today, in this PR to also include paper-progress-circular as well. Should i create a new PR for progress circular now that linear is in master?

[miguelcobain]

@peec A new PR would be awesome!

[peec]

Closed, ref #136