Some protokoll changes, new dblib

This is an unstable branch, the program does not run!
updatefile, getfileprop, getfilename in dblib, handler extended.
Database now implemented, indexing and uploading splitted

The database schema and one token (sha512(moritz:'random')) is in the file
server.sql, with can be converted into a sqlite db using
sqlite3 server.db <server.sql

The database backend is modular, one base class with mostly 'pass'-funktions,
one with SQL-statements and one with con-and destructor for sqlite.