* Move AppHelpers to core Following up on the request from a recent TSC meeting, this PR moves the App Helpers code into the core library. This adds no new third-party dependencies. (The App Helpers code is intended to simplify the work of integrating OCIO into a real-world DCC application.) Also, following up on another suggestion, the ViewingPipeline class was renamed LegacyViewingPipeline. Signed-off-by: Bernard Lefebvre <bernard.lefebvre@autodesk.com> * Forgot to remove function declaration Signed-off-by: Bernard Lefebvre <bernard.lefebvre@autodesk.com> * Add python exposure Signed-off-by: Bernard Lefebvre <bernard.lefebvre@autodesk.com> * Fixing the build with DOC. Still have to update the rst doc files. Signed-off-by: Bernard Lefebvre <bernard.lefebvre@autodesk.com> * Add filtering options to app helpers as described in issue 1222 Signed-off-by: Bernard Lefebvre <bernard.lefebvre@autodesk.com> * Fix merge issue Signed-off-by: Bernard Lefebvre <bernard.lefebvre@autodesk.com> * Add missing destructor Signed-off-by: Bernard Lefebvre <bernard.lefebvre@autodesk.com> * cast issue Signed-off-by: Bernard Lefebvre <bernard.lefebvre@autodesk.com> Co-authored-by: doug-walker <43830961+doug-walker@users.noreply.github.com>