Update ShareKit.podspec

Adding missing Google-API-Client/Objects dependency to GooglePlus
Update ShareKit.podspec

Adding missing Google-API-Client/Utilities to GooglePlus
Merge pull request #816 from iartem/master

Missing dependency in Sharekit.Podspec for Google Plus
Fixed Vkontakte web view hanging in the case of unavailable network - tried to dismiss modal controller during presentation
Merge pull request #817 from tkach/master

Fixed Vkontakte web view hanging in the case of unavailable network - tr...