* include/functions_filemanager.php: cleaned source code, changed the show
to buttons of actions (create file, upload...) to out the list of files. And
check if the directory is writeable to show this buttons.
* include/get_file.php: added file to work as mediator between the Pandora
and file system, and added a some security checks as check login and others.
git-svn-id: https://svn.code.sf.net/p/pandora/code/trunk@3083 c3f86ba8-e40f-0410-aaad-9ba5e7f4b01f