- Changelog for v0.3.4 (2018-03-23):
  * Bump version to v0.3.4
  * Make container env variable conditional
  * Stage 4 Image cleanup
  * Add CONTAINER environment variable
  * Small manpage reword
  * Document .containerenv in manpages. Move it to /run.
  * Add .containerenv file
  * Add script to determine dependency sizes
  * If cidfile exists, do not proceed
  * Removing tagged images change in behavior
  * Use podman to test podman on FAH
  * Migrate podman inspect and tag to image library
  * Migrate podman images to image library
  * Makefile: add changelog target
  * Image library stage 4 - create and commit
  * Add 'podman restart' asciinema
  * Fix Travis tests for sig-proxy