Pin specific pybids version in Dockerfile

Author: effigies

docker/generate_dockerfiles.sh

@@ -107,7 +107,7 @@ function generate_main_dockerfile() {
               pip_opts="-e" \
               pip_install="/src/nipype[all]" \
   --run-bash "mkdir -p /src/pybids
-         && curl -sSL --retry 5 https://github.com/INCF/pybids/tarball/master
+         && curl -sSL --retry 5 https://github.com/INCF/pybids/tarball/0.5.1
          | tar -xz -C /src/pybids --strip-components 1
          && source activate neuro
          && pip install --no-cache-dir -e /src/pybids" \