Update: dev-2.2.4

Here is a changelog:

[*] allow to send text feedback along with the rating.
[*] it is no longer to vote multiple times as a guest
[*] save and load GUI window positions. Saving now happens autmatically
[*] add prayer bonus to the stats (daos + structs + sql database)
Note: the prayer bonus is not yet applied to the player on the server side....