[IZPACK-973] - Custom panel translations - add possibility to use the panel ID as translation key prefix for headline/headinfo localization (post fixes)
Moved log message for missing custom language pack to debug level, not interesting in normal case
Build fix
Build fix and cleanup
Merge branch 'IZPACK-973' of github.com:rkrell/izpack into IZPACK-973
More cleanups
Merge branch 'IZPACK-973' of github.com:rkrell/izpack into IZPACK-973
Merge pull request #132 from rkrell/IZPACK-973

[IZPACK-973] - custom panel translations - post-fix
IZPACK-970 - post-fix with another approach to not break the existing API
Merge pull request #133 from rkrell/IZPACK-970

IZPACK-970 - post-fix with another approach to not break the existing API
Added two field validation unit tests for the RuleField.
[IZPACK-977] Added ContainsCondition (feature)
Merge pull request #134 from rkrell/IZPACK-977

[IZPACK-977] Added ContainsCondition (feature)