Merge tag 'v0.2.0' into develop

update polymer to 0.5.x
Use core-iconset-svg rather than images
FIX deprecated moment methods : add, lang
prevent selecting content of the calendar
Example of customizing the calendar
CHANGELOG
Merge branch 'feature/moment' into develop
change version to 0.2.1
Merge branch 'release/0.2.1'