Handle jsonpointer to context.
Handle jsonpointer to context.

jeremiahsavage/cwltool,dleehr/cwltool,SciDAP/cwltool,SciDAP/cwltool,chapmanb/cwltool,jeremiahsavage/cwltool,jeremiahsavage/cwltool,common-workflow-language/cwltool,SciDAP/cwltool,chapmanb/cwltool,chapmanb/cwltool,SciDAP/cwltool,common-workflow-language/cwltool,dleehr/cwltool,dleehr/cwltool,common-workflow-language/cwltool,jeremiahsavage/cwltool,dleehr/cwltool,chapmanb/cwltool