checkbox group helper
default server is now configurable
Added documentation
Added test
Merge pull request #1494 from nraychaudhuri/checkbox_group_template

checkbox group helper
Merge pull request #1521 from nraychaudhuri/make_default_ebean_configurable

default ebean server is now configurable
Merge remote-tracking branch 'origin/master' into actions
Rename ActionFunction.compose to andThen

To be consistent with other standard function compositions.  The operator still
needs a better name.  Continuing proposal for Issue #1986.