Issue #75: Fix warning on implicit conversion from CGImageAlphaInfo to CGBitmapInfo (safe according to https://developer.apple.com/library/ios/documentation/graphicsimaging/Reference/CGBitmapContext/Reference/reference.html#//apple_ref/c/func/CGBitmapContextCreate).
Remove Xcode 5 file.
Issue #74: Fix warnings for implicit conversions of UITextAlignment and UILineBreakMode
Explicitly set spaces settings at the project level
Do not use deprecated delegate method
Use only one activity view controller per UIActivity

On iPad under iOS 6, calling `activityDidFinish:` internally calls -[BITFeedbackActivity activityViewController]. We must therefore keep a reference to the previously created activity view controller else the activity view controller can not be dismissed since a new instance is returned for dismissal. Under iOS 7, -[BITFeedbackActivity activityViewController] is not called for dismissal.

On iPhone, the -[BITFeedbackActivity activityViewController] method is not called for dismissal.
Comply to -[UIActivity activityDidFinish:] requirements
Cleanup base64 code

Use -[NSData base64Encoding] which exists since iOS 4.0 (but is only documented since the iOS 7 SDK).
Delete base64 tests
Fix compile issues when excluding all modules but crash reporting
Use UTF8 encoding for auth data
Merge pull request #76 from 0xced/dismiss-feedback-ipad-fix

Fix the feedback activity not being dismissed issue
Fix a bug when creating crash report textual representation

It was working always before, but isn't actually correct.
Merge branch 'base64' of github.com:0xced/HockeySDK-iOS into 0xced-base64 with modifications

- Don't use `base64Encoding` if the SDK is build with iOS 7 as based SDK, since that would cause a deprecation warning
Don't use a category in BITCrashReportTextFormatter

This allows the framework to be used inside another framework.
Hide deprecation warning

Even when using iOS 7 only as base SDK calling `base64Encoding` causes a deprecation warning.
Updated podspec to use vendored_frameworks attribute
re-added preserve_paths and frameworks
Merge pull request #79 from elektrojunge/master

Updated podspec to use vendored_frameworks attribute
Fix two block related memory issues in BITAuthenticator