To ensure sources are buildable, add one job for any desired branch with default configuration (JDK, etc), and maybe others with different configurations.
For now, schedule only required (with defaults) daily, and maybe keep others not enabled and execute them only by hand.
One time created, post here job URLs so it's simple to reference them (note that any build has an RSS feed that could be useful to get by browsers).
If possible, before doing this, update Zest build to use latest Gradle (2.4).
Note: be free to update this description and/or reassign to another Zest member.