Updates podfile to use latest DTCoreText and WPiOS shared.
Updates Podfile to latest DTCoreText and WordPress-iOS-Shared

WordPress-iOS-Shared was changed to point to github vs the pod until the pod can be updated.
Merge pull request #1896 from wordpress-mobile/issues/update-dtcoretext-pod

Update DTCoreText pod
Merge branch 'develop' of github.com:wordpress-mobile/WordPress-iOS into issue/update-colors

Conflicts:
	Podfile
	Podfile.lock
	Pods/Local Podspecs/WordPress-iOS-Shared.podspec
	Pods/Manifest.lock
	Pods/Pods-environment.h
	Pods/Pods.xcodeproj/project.pbxproj
Fixing pods from merge.