Fix: missing #import <Foundation/Foundation.h> in SBJsonStreamTokeniser.h

Caused error: cannot find interface declaration for 'NSObject', superclass of 'SBJsonStreamTokeniser'
Update README.md to point to https so github doesnt cache a bad badge
Merge pull request #179 from waffleio/patch-2

Update README.md to point to https so github doesnt cache a bad badge
Merge pull request #176 from sergey-vlasov/master

Fix: missing #import Foundation.h in SBJsonStreamTokeniser.h