Merge pull request #10 from celements/validation

IValidationRuleRole split
RequestParameter.create() made public for tests in progon-core
[maven-release-plugin] prepare release celements-core-1.47
[maven-release-plugin] prepare for next development iteration
moved field excludeFormIsFilledCheck to FormConfigClass
Merge branch 'dev' of git@github.com:celements/celements-core.git into dev
Create README.md
Log entries added
fix: not matching regex if regex string is empty
remove migration and migrator packages which were split from
celements-core into cel-subsystemMigrationManager
Merge branch 'dev' of git@github.com:celements/celements-core.git into dev
prepare tests for unstable-2.0 (move context.setUser after replay call)
add getRefDefaultSerializer and getRefLocalSerializer to bridge the gap
to xwiki 4.5
change usage of web-preference title field to improve search engine
significance. Use as suffix instead of prefix
fix getting EntityReferenceResolver using WebUtilsService to be
compatible with XWiki 4.x
fix usage of EntityReferenceSerializer to be compatible with XWiki 4.x
fix usage of EntityReferenceSerializer to be compatible with XWiki 4.x
fix serializer for compatibility with unstable branch
Merge branch 'dev' of github.com:celements/celements-core into dev
fix usage of EntityReferenceSerializer to be compatible with XWiki 4.x