[Builder] DX of using stable Builder version

[anatoly techtonik <techtonik gmail com>]

Hi,

Developers know better when a product is better than
package maintainers. What is the proper way to use
latest stable version of Builder on Ubuntu?

I was going to to report some bugs with 3.18, but now
I see that 3.20 is available, and I don't have much
time for yak shaving - DX of downloading .tar.xz and
recompiling (with deps) and relaunching is awful.

Please, CC.
-- 
anatoly t.