arc90/ReadabilityActivity — pull request #1 by adobkin (2012-10-12 08:15:27+00:00)
Title: Improvements in the code

- In canPerformWithActivityItems added check that Readability is installed on a device, if not check, the item Readability is always visible to share sheet. Also added check that items of activityItems is kind of NSURL or NSString

- Changed method performActivity

- Constants ReadabilityActivityURI and ReadabilityActivityAdd declared as static