Updated version for next release cycle
Remove reflection warnings
Allow :base-image to be specified in project.clj

Closes #13.
Add extra link to readme on docker api setup

Closes #12
Add comment on pulling base image to README

Addresses #11
Update to clj-docker 0.1.2
Updated project.clj, release notes and readme for 0.2.0
Merge release/0.2.0