CrossSystem: added caseSensitiveFileExists

git-svn-id: svn://svn.appwork.org/utils@2165 21714237-3853-44ef-a1f0-ef8f03a7d1fe
Avoid Stack loops in canStore function


git-svn-id: svn://svn.appwork.org/utils@2166 21714237-3853-44ef-a1f0-ef8f03a7d1fe
build>full

git-svn-id: svn://svn.appwork.org/utils@2167 21714237-3853-44ef-a1f0-ef8f03a7d1fe