-added "show files" feature for DE_PG_fileAPI
-some other small changes
-added "show files" feature for DE_PG_fileAPI
-now the files are listed and file contents are loaded after a click.
-small changes in DE_PG_fileAPI
CAUTION/ BUG: The whole app moved a bit down. (There's a gap at above the app)
This needs to be solved!

-added first idea for PE_LocalStorage