Move string related helper classes to string package.

...java/ch/systemsx/cisd/authentication/file/Parameters.java

...ava/ch/systemsx/cisd/common/filesystem/FileUtilities.java

...ch/systemsx/cisd/common/parser/DefaultPropertyMapper.java

...ystemsx/cisd/common/parser/IndexOutOfBoundsException.java

...java/ch/systemsx/cisd/common/string/MatrixComparator.java

.../systemsx/cisd/common/string/ReflectingStringEscaper.java

...ystemsx/cisd/common/string/ReflectingStringUnescaper.java

...ystemsx/cisd/common/string/ReflectionStringTraverser.java

.../java/ch/systemsx/cisd/common/string/StringUtilities.java

...systemsx/cisd/common/collections/CollectionUtilsTest.java

.../ch/systemsx/cisd/common/string/MatrixComparatorTest.java

...temsx/cisd/common/string/ReflectingStringEscaperTest.java

...msx/cisd/common/string/ReflectingStringUnescaperTest.java

...emsx/cisd/common/string/ReflectionFieldTraverserTest.java

...a/ch/systemsx/cisd/common/string/StringUtilitiesTest.java

...s/generic/server/RemoteDataSetFileOperationsExecutor.java

...penbis/generic/client/web/server/CommonClientService.java

.../client/web/server/StringHtmlEscapingPointcutAdvisor.java

...ric/client/web/server/translator/ResultSetTranslator.java

...ric/shared/dto/identifier/DatabaseInstanceIdentifier.java