prepare to modify gdata object.
replace group tag UI with HEBubbleView.
enable distinguish editing and no-editing of group tag view.
add InAppSettings
upgrade for retina 4.0.
update compile settings for armv7 and armv7s(iPhone 3G and iPod 2 are not supported from now).
update launch  images.
update compile settings for armv7 and armv7s(iPhone 3G and iPod 2 are not supported from now).
add 2.0 informations and images.
merge source code from release 2.0 to fix the BackButton hiding issue.
remove duplicate phone numbers.
add the merging and setting forms.
merge source code from release 2.0 to fix the BackButton hiding issue.
refactor the structure of source code.
update multi-languages
update multi-languages
implement  native contacts syncing.
purchase and deletion button
enable purchase.
add the purchase progress view.
Implements purchase UI.