Changed default login from email+password to the more familiar username+password.

The old system has been moved to contrib/mux-login.py.
This change was done due to the need for an email seems counterintuitive to
many new developers, giving the impression that it is actually required by
django (it is not, rather it was supposedly similar to MUX).

game/gamesrc/conf/examples/connection_screens.py

@@ -28,8 +28,24 @@ new module.
 from src.utils import utils
 from src.commands.connection_screen import DEFAULT_SCREEN
 
-#
+# # A copy of the default screen to modify
+
 # CUSTOM_SCREEN = \
+#"""{b=============================================================={n
+# Welcome to {gEvennia{n, version %s!
+#
+# If you have an existing account, connect to it by typing:
+#      {wconnect <username> <password>{n
+# If you need to create an account, type (without the <>'s):
+#      {wcreate <username> <password>{n
+#
+# If you have spaces in your username, enclose it in quotes.
+# Enter {whelp{n for more info. {wlook{n will re-show this screen.
+#{b=============================================================={n""" % utils.get_evennia_version()
+
+# # Mux-like alternative screen for contrib/mux_login.py
+
+# MUX_SCREEN = \
 # """{b=============================================================={n
 # Welcome to {gEvennia{n, version %s!
 #
@@ -41,7 +57,7 @@ from src.commands.connection_screen import DEFAULT_SCREEN
 # Enter {whelp{n for more info. {wlook{n will re-load this screen.
 #{b=============================================================={n""" % utils.get_evennia_version()
 
-# # A suggested alternative screen for the Menu login system
+# # Menu login minimal header for contrib/menu_login.py
 
 # MENU_SCREEN = \
 # """{b=============================================================={n