Add image override example
Fixes various 64 bit-related warnings
Localization .strings files for Catalog
Merge branch 'master' of github.com:PSPDFKit/PSPDFKit-Demo
Fixes localization
Update localization headers
Localization
64bit issues
Made PSCatalogViewController implement PSPDFDigitalSignatureRevisionDelegate to enable display of previously signed revisions of forms.
Moved revision delegate to app delegate and corrected back button when viewing revisions.
Use new revisions API and show title correctly.
Merge branch 'vic/sig-revisions' of https://github.com/PSPDFKit/PSPDFKit-Demo into vic/sig-revisions
Form and signature examples for demo.