Changed DTAttributedTextContentView to discard invalid CGContexts.
Merge pull request #697 from DanielMaly/master

Changed DTAttributedTextContentView to discard invalid CGContexts.
Added missing spaces
adjusted coding style in programming guide
removed objective-c tag, unfortunately not supported by appledoc
Also test documentation completeness
changed doc building to use schema
Added shared scheme for building docs
Testing missing parameter
Added exit status fix for appledoc
Pass through exit status from appledoc
Added built-in docs testing to static lib target
Moved build commands to shell script
Modivied travis build yml to call build script
made build.sh executable
Fixed documentation comments
Updated DTFoundation for docu bug
if no color set, use kCTForegroundColorFromContextAttributeName
Update Setup Guide for manual sub-project integration
fix brace style and add comment