updated the proguard settings of TStore
added new proguard config https://github.com/onepf/OpenIAB/issues/82
Merge pull request #98 from oorlov/tstore_proguard_updated

#82 updated the proguard settings of TStore
#97 handle dispose()
https://github.com/onepf/OpenIAB/issues/97
Merge pull request #103 from oorlov/#97-part1-dispose()

#97 handle dispose()
Merge branch 'master' of https://github.com/onepf/OpenIAB