Add in CHANGES.md.
Propagate exit codes to the main shell. Closes #6.
Properly handle os-specific commands.
Write about OS-specific commands. Closes #3.
Add 2.0.0 changelog.
Update readme.
lein-shell 0.2.0

Signed-off-by: Jean Niklas L'orange <jeannikl@hypirion.com>
Back to snapshot.
Add pom.xml.asc to .gitignore.