[applecod] Added missing parameter descriptions

Copy-paste from UIWebView reference
[appledoc] Added missing notes on QR code scanning
code style fix

Using instancetype keyword
[appledoc] Added missing descriptions of the SCMapView class
[appledoc] Added missing method documentation
[appledoc] Added reference for "extended web view" related classes

SitecoreMobileJavaScript.framework reference
[appledoc] Added reference for SCUploadProgress protocol
[appledoc] Added reference for FP extensions of NSArray
[appledoc] Added reference for async operation flow methods