CHANGELOG: Document changes since v0.1.0
CHANGELOG: Document changes since v0.1.0

Through 9d9f709 (Merge pull request #483 from
Mashimiao/release-v0.2.0, 2017-09-25).

Signed-off-by: W. Trevor King <f75897670c17327c42ab201733fb8a81ff9f4c34@tremily.us>

opencontainers/ocitools,opencontainers/ocitools,liangchenye/ocitools,wking/ocitools-v2,opencontainers/runtime-tools,wking/ocitools-v2,opencontainers/runtime-tools,liangchenye/ocitools