Add brief build notes for those unfamiliar with maven.

Signed-off-by: Ben Greear <greearb@candelatech.com>
Fix build with older versions of maven.

Don't require specific version of some plugins, and add some dummy
methods to two of the test files.
Fix some resource bundle issues in the chart -> Properties menu.

Looks like an old properties file went away or something.  This
gets it functional in English, at least.