Prepare Second Prokect

Added:
-package ch.ethz.inf.dbproject.sqlRevisited
With:
-Connection.java
-PreparedStatement.java
-ResultSet.java
These classes contain just all (hopefully) skeletons of methods we used
in the project.

Updated a little issue in:
-Datastore.java
-Person.java
-PersonNote.java
-User.java
Constructor is now from super class.