Fixes pdf application switching in FF22/23 (redo)
Fix lab colorspace decoding and rgb conversion.
Disables cloning of the Dict
Merge pull request #1545 from yurydelendik/revert-Dict-xref-hide

Revert Dict xref hiding
Merge pull request #3036 from yurydelendik/appswitch

Fixes pdf application switching in FF22/23 (redo)
Merge pull request #3038 from brendandahl/lab-cs

Fix lab colorspace decoding and rgb conversion.
Fixes Dict_assignXref type