iOS Conf SG - logo proposal 4th iteration

4th iteration of Logo proposal for iOS Conf SG 2017 http://iosconf.sg/

Notes: - Bring back the orange, replacing the red. - Instead of red/green/white or orange/yellow/brown, stick with this orange/green/white combo (best of both worlds?). - Simplified everything; colors, shadows and gradients. - Try out different text sizes for Heading 1, 2 and sub-heading text.