backport of i3-wm

[David Bremner <david@tethera.net>]

Hi Michael;

Do you have any plans to prove a stretch backport of i3wm?  My naive
attempt to rebuild it in stretch failed with some apparently C
preprocessor related problem.

In file included from ../../i3-wm/src/ipc.c:12:0:
../../i3-wm/src/ipc.c: In function ‘handle_get_version’:
../../i3-wm/include/yajl_utils.h:19:50: error: expected expression before ‘)’ token
 #define y(x, ...) yajl_gen_##x(gen, ##__VA_ARGS__)

Cheers,

David