Removes shadow dom api selector

Merge pull request #19 from unicef-polymer/remove-shadowdom-selector

removes deprecated shadow dom api selector

added optional secondary title

Merge pull request #18 from unicef-polymer/add-optional-header

added feature to have header say optional

Styles updates

Add btn positioned at the bottom right of the list

v1.0.8

Update bower.json

performance updates

v1.0.7

Update bower.json

Added local dom lenght check

This prevent the element to go "in column" when navigating away from the page and going back
(in t2f for example changing travel) the check is made on the local dom container so is not that much slow.

v1.0.5

Update bower.json

v1.0.4

Update bower.json

v1.0.3

Update bower.json

v1.0.2

Update bower.json