Add load-project, and make distill print changes

The load-project function will read the current project.clj file's
dependencies and load any new ones.

The distill function now prints the dependency coordinates that are
loaded, and separately those that are not due to conflicts.  It also
now accepts a sequence of dependencies to load.

The previous return behaviour of distill is available in distill*.
Add new .nrepl-port to .gitignore
Add new doc to .gitignore
Updated project.clj, release notes and readme for 0.2.0
Merge branch 'release/0.2.0'
Merge tag '0.2.0' into develop

alembic-0.2.0
Updated version for next release cycle