Added `my-narrow-to-{region,page,defun}-indirect', with bindings under C-x 4:

C-x 4 n n, C-x 4 n p, and C-x 4 n d respectively.
Fix <C-left> and <C-right> in term-char-mode.
Added `my-copy-eterm-color-terminfo'.

If a remote shell does not recognise Emacs' eterm-color terminal type,
this will copy the terminfo files to a specified remote host, via tramp.
Deleting yasnippet for now, as it's causing a start-up error.

TODO: Install newer version.