fix for #51. Quering more that 20 items. https://code.google.com/p/marketbilling/issues/detail?id=123
Merge branch 'origin/ios'
ant artifacts adjustments
signing apk + instructions
Delete life.apk

Oleg Orlov told me that this file is not needed.
Merge pull request #56 from sergeich/patch-1

Delete obsolete prod/life.apk
obsolete gradle support
Unity: support iOS. Ant scripts for build