rebranding the terminal plugin as manx (mitre#1350)

.gitmodules

@@ -10,9 +10,6 @@
 [submodule "plugins/caltack"]
 	path = plugins/caltack
 	url = https://github.com/mitre/caltack.git
-[submodule "plugins/terminal"]
-	path = plugins/terminal
-	url = https://github.com/mitre/terminal.git
 [submodule "plugins/mock"]
 	path = plugins/mock
 	url = https://github.com/mitre/mock.git
@@ -31,3 +28,6 @@
 [submodule "plugins/gameboard"]
 	path = plugins/gameboard
 	url = https://github.com/mitre/gameboard.git
+[submodule "plugins/manx"]
+	path = plugins/manx
+	url = https://github.com/mitre/manx.git

app/contacts/contact_tcp.py

@@ -4,7 +4,7 @@
 import time
 
 from app.utility.base_world import BaseWorld
-from plugins.terminal.app.c_session import Session
+from plugins.manx.app.c_session import Session
 
 
 class Tcp(BaseWorld):

conf/default.yml

@@ -10,7 +10,7 @@ plugins:
 - sandcat
 - stockpile
 - compass
-- terminal
+- manx
 - response
 - gameboard
 port: 8888