Update bashrc with comment

dotfiles/bash/bashrc

@@ -1,6 +1,9 @@
 # Use the iterm2 material theme in the root directory of the essentials repository. For linux,
-# you will need to source a material theme color scheme for your terminal.
+# you will need to source a material theme color scheme for your terminal (for XFCE use nord in the xfce
+# themes folder).
 
+# This monstrosity returns the directory of the .bashrc from it's symlinked source so we can
+# call script files correctly.
 symlink_dir=$( cd "$( dirname "`readlink -f ${BASH_SOURCE[0]}`" )" && pwd )
 
 # Useful global functions