Move Some Devel Properties & APIs to the Public API

control-devel.h
DALI_IMPORT_API Toolkit::Visual::ResourceStatus GetVisualResourceStatus(
const Internal::Control& control, Dali::Property::Index index );

texture-manager.h
DALI_IMPORT_API std::string AddTexture( Texture& texture );
DALI_IMPORT_API std::string AddTexture( TextureSet& textureSet );
DALI_IMPORT_API TextureSet RemoveTexture( const std::string& textureUrl
);

image-visual-properties-devel.h
LoadPolicy
ReleasePolicy
LOAD_POLICY
RELEASE_POLICY
ORIENTATION_CORRECTION

Change-Id: I78f93a9783e217e179c110b55c5e7e0a79243438