Bump version to 0.3.
Fix capitalisation: BinTray -> Bintray.
Update README with 'info' and 'list' commands.
Add build status to README (using drone.io).
Use Java logging for diagnostic info.

I have incorporated Groovy's @Log annotation to provide loggers for the main
classes. A logger is also available to post-installation scripts via the log
property as well.

I have also switched back to using println() for the normal output of commands.
I originally used an explicit System.out.println() call and put that inside
another method to avoid Groovy initialisation cost. But that cost seems to be
incurred no matter what I do (unless I write Java code), so this 'optimisation'
just isn't worth it.
Added groovy config slurper for configurable repos

You can now specify a list of bintray repositories to read from. In
~/.lazybones/lazybones.properties add a line like this:

bintrayRepositories = [
   "kyleboon/lazybones",
   "pledbrook/lazybones-templates"
]

which will allow you to use templates from either repository.
Repositories listed first are higher priority. if 'some-template' exists
in both repositories, it will use the one in the first repository
listed.

list, info and create were all updated to work with multiple
repositories.