[issue #16] moved StringTools to de.cismet.commons.utils package and renamed it to StringUtils
[issue #16] this is the rename changes within the file
[issue #16] added junit test for stringutils
[issue #16] more compact implementation of deleteWhitespaces(String)
[issue #16] added field containing all the java keywords and operation to check if a given string is a keyword
[issue #16] added operation the transforms a string into a valid java package name
Merge branch 'feature/16-stringutils-for-packages' into dev