Fix delete non empty directory in filesystem_treeview
Create directory in filesystem_treeview
Fix https://github.com/pyQode/pyQode/issues/6 and https://github.com/pyQode/pyqode.core/pull/153
Cleanup
Complete https://github.com/pyQode/pyQode/issues/5. Add extra check when create file or directory.
Merge pull request #153 from max107/tree

Fixed removing non empty directory. Added create directory.