master branch is hard-coded

[tomalec]

Description

iron-component-page has "master" branch name hard-coded therefore it's impossible to use it with any other branch.

Expected outcome

iron-component-page should be able to render component page regardless of branch name

Actual outcome

No documentation found.

is shown

Live Demo

http://puppetjs.github.io/puppet-polymer-client/

Steps to reproduce

1. Create custom-element as any other.
2. Use branch anything.
3. Open http://yourorganization.github.io/custom-element/.

Browsers Affected

• Chrome
• Firefox
• Safari 9
• Safari 8
• Safari 7
• Edge
• IE 11
• IE 10

[tomalec]

@justinfagnani Could you take a look?
All checks are passing for PR #102.
I think the fix is quite non-intrusive.
But issue makes iron-component-page useless to quite many (at least our) custom elements.