update json data to match new format.
Merge pull request #5 from nullaus/support-contacts-tmobile-json

update json data to match new format.
Delete .DS_Store
Move att sim to variant.json
Add no default bookmark use case
Remove contacts.json
Add variant default customization
Reverted variant change, as it's not supported
Fix support links
Added sample appcache & packaged app customization test cases