add .gitattributes and modifying .tmux.conf

gitattributes created to handle tmux.conf being shitty about line endings
.tmux.conf to work cross platform, macOS and windows.

.gitattributes

@@ -0,0 +1,2 @@
+# set default behavior for line endings
+text eol=lf

.tmux.conf

@@ -1,7 +1,4 @@
 # rebind the dumb prefix key
 unbind C-b
 set-option -g prefix C-t
-bind-key C-t send-prefix
-
-# enable ability to click between panes
-set -g mouse on
+bind-key C-t send-prefix