Resize mode indicator

[antoniotrkdz]

It would be great to add this feature.

[denesb]

This was already added by #39

[denesb]

I just didn't do a release since merging it.

[antoniotrkdz]

Great! Do you plan to release it soon?

[denesb]

I planned to do a new release after the new i3-ipc-glibc release, but I guess I can make a minor release with the the changes since the last release.

[antoniotrkdz]

That would be nice. Like a 1.2.1 or similar, just to keep things cool an tidy. Also it would be useful to clearly list the binding mode indicator feature in a changelog.
However, I got it working just by puling new master and rebuilding the deb package.
Awesome work! Thank you.