add loggings, documentation and removed unnecessary comments

add loggings

deleting files implemented

deleting files implemented

fixed bug where if user does not have write access, he still can write

cleaner code, remove unnecessary functions, register new user now demands a strong password

cleaner code - transfer the request.data to the functions instead of the request itself

remove unnecessary functions

now uses operation class, remove unnecessary functions

now uses operation class

if two manage access windows are open at the same time, the other one closes

bug fixed where the first and last name would not be sent to the user,disconnection handled.

logout button now logs out (does not close socket), and returns to login screen

greets the user after login,

saves passwords as hash