code-mirror issue with core-animated-pages

[daadu]

Continuation from : googlearchive/polymer-tutorial#15

I don't know how to write unit test, so have simplified the page as told and is served on cloud.
Simplified test case live at : http://app.polymer-ize.appspot.com/static/front-end/play.html

[daadu]

Modified a code little

made readycallback --> domReady
it worked but only for select="0"
for the code-mirror on other page ready was working fine, so added a lazy attribute, and did this:

I dont know if i have solved the problem or not but it is working fine for now.