Merge branch 'release/0.4-RC2' into develop
0.4 in README
Demo and persistence test moved out.
Uses all the columns if the "searchcolumns" dynamic property  is not specified.
Code optimization.
Bugfix in criteria query with Hibernate
(illegalstateexception: No explicit selection and an implicit one cold not be determined)
Warning fix: java: Some input files use unchecked or unsafe operations.
Merge branch 'release/0.4'