Cleanup mock servers & fix demo

[warpech]

After #16 there are some problems:

• instances of jasmine-core and jasmine-ajax still loaded in the test helper, but (probably?) not used anymore
• demo/index.html seems to not work anymore (seen on @aloscha's screen)

[joozek78]

Live Demo still fails due to dependencies fail

[joozek78]

It turned out that iron-component-page is broken. It detects if it's served from gh-pages and if so, it uses cdn.rawgit.com to fetch element to present. It has two problems:

1. cdn.rawgit.com is case-sensitive and our org name (PuppetJs) contains uppercase characters. Iron-component-page never works in such case (see code)
2. cdn.rawgit.com caches permanently, but iron-component-page always refers to master, so it quickly grows stale
3. iron-component-page refers to master, but we use gh-pages as main branch

I changed the link in the readme to point directly to demo (which works fine) to avoid iron-component-page

[warpech]

@joozek78 could you please write an issue in https://github.com/PolymerElements/iron-component-page about this?

So we play nice with the ecosystem, not just abandon ship because it has a bug.

[joozek78]

@warpech It seems that there are already 2 issues posted there, both ignored by the team: PolymerElements/iron-component-page#44 and PolymerElements/iron-component-page#101. @tomalec even submitted a PR for the second one, but it hasn't been addressed by the team either. I don't see what I could do there beside "liking" the issues :(

[warpech]

I see. Then we we did all we can. Thanks!