compiler error

[GINNOV]

branch: Swift 2.2
xcode 7.3.x

Steps to repro:

1. clone
2. switch to branch 2.2
3. open example project in xcode and build

actual:
Github/QRCode/QRCode/CIImageExtension.swift:21:15: Initializer for conditional binding must have Optional type, not 'CGImage'

/Github/QRCode/QRCode/QRCode.swift:63:41: Cannot use optional chaining on non-optional value of type 'String'

[laoyur]

the same issue here