* src/vte.c: Skip lookups for padding information if we're pretty sure we're
	using a monospaced font.
* src/vte.c: Fix from Brian Cameron for uninitialized GError in
	vte_wc_from_unichar().
* src/interpret.c, src/iso2022.c, src/pty.c, src/ring.h, src/table.c,
	src/table.h, src/trie.c, src/vte.c, src/vteaccess.c: Signed/unsigned
	int/size_t/gsize and pointer typecast warning fixes from Brian Cameron.
* src/vte.c: Avoid invalidating the cursor in the cursor blink timeout unless
	we have focus.
* src/pty.c, src/pty.h: Add vte_pty_close() and vte_pty_open_with_logging(),
	breaking the ABI but not the existing API.
* src/vte.c, src/vte.h: Add vte_terminal_fork_logged_command(), breaking the
	ABI but not the existing API.
* gnome-pty-helper/*: Swallow the pty helper bits of gnome-libs, but install
	into $pkglibdir instead of $sbindir so that existing packages don't
	suddenly start breaking.
* src/termcap.c(_vte_termcap_find_string_length):...