New article: Using multiple LIRC infra-red transceivers with stb-tester

This is mostly copied from Mate Szendro's commit message where he added
support to stb-tester for multiple lirc devices:
https://github.com/drothlis/stb-tester/commit/1ccc2b1f
RSS entry to match commit 7d57ae6e
index.html: Shorten title of Jenkins article

It also reads more naturally this way.

I've left the title of the article itself (jenkins.html) as it is,
because it needs the word "stb-tester" in the title. (On the index page
"stb-tester" is already prominent.)