shared: rename class to account
shared: implement connect method
add net http reference
shared: account - implement singleton pattern's
shared: remove unused item group
shared: add newtonsoft json reference
shared: implement error model
shared: implement connect error handler
shared: implement connect success handler
ios: perform feed vc segue on login success
ios: login vc - implement activity indicator logic
ios: login vc: implement alert view on error
ios: login vc - cosmetic changes