0.0.13

• skip_scratch option for add_lines, to skip adding lines to FROM scratch sections

0.0.12

• Require six package

0.0.11

• Improve capabilities for multistage Dockerfiles

0.0.10

• add newline if necessary when adding instructions

0.0.9

• Do not overwrite multiple FROMs for multi-stage builds
• Fix "LABEL summary=$SUMMARY" handling

0.0.8

• Fix b2u()/u2b() for Python 3
• Concatenated variables are now correctly expanded

0.0.7

• New context_structure property, for examining environment variables and labels at each Dockerfile line (#33)
• Improvements to spec file

0.0.6

• you can now specify a starting environment for environment variable substitution to use (#20)
• a file-like object can now be used instead of a path (#23)
• comments in multi-line instructions are now correctly skipped (#16)
• new __version__ module attribute