cwltool 1.0.20190915164430

udocker: pull before execution so that ToolTimeLimit isn't affected #1177
Add input_required flag to main() #1169
handle error in cidfile removal more gracefully #1183
singularity: if dockerImageId is a local file, use it #1187
Push conformance badges to commonwl/conformance repository #1189
Provide cwltool_latest for badges #1192
--provenance: conformance tests fixes #1193
refactoring to support --provenance with toil-cwl-runner #1194
Fix for argument with empty prefix and separate False #1166
attempt to debug test failure on reproducible-builds.org #1197