Added grep coloring alias

dotfiles/bash/global-before.bashrc

@@ -14,7 +14,7 @@ export GLOBIGNORE=.:..
 
 # some more aliases
 alias ll='ls -lh'
-alias grep='grep -I'    # do not match binary files
+alias grep='grep -color --binary-files=without-match'
 alias open='gnome-open'
 alias diff='diff -u'