Fix install instructions
Fix tag name for release

The tag name incorrectly included a release/ prefix.
Make finish commit any modified files

This is so that any modified files, e.g. source files modified by the
set-version plugin, are committed.
Refactor into git and lein namespaces

Put all git and lein commands into their respective namespaces.
Add debug logging to lein and git functions
Refactor init

Move init into the release namespace.  Pull init specific functions out
of lein namespace.
Remove lein-pallet-release from :plugins
Fix update-release-notes

The previous version wasn't being passed.
Updated project.clj, release notes and readme for 0.1.1
Updated version for next release cycle