add is_writeable() checks for all attempts to create dirs or open files to write, so fatal errors are avoided
add is_writeable() checks for all attempts to create dirs
or open files to write, so fatal errors are avoided


git-svn-id: 4b064e69dc630d28214c1e1442d27300cccf8e9a@180196 c90b9560-bf6c-de11-be94-00142212c4b1

DQNEO/PEAR_Exception