stbt control: Output message: "Control" instead of "Listener"

This isn't "listening" using, for example, LIRC; it's using LIRC to
*send* the signals.
extra/runner: Send error messages from `sensors` to sensors.log

When run on a VM, `run` was printing the following error message to the
console after every test run:

    No sensors found!
    Make sure you loaded all the kernel drivers you need.
    Try sensors-detect to find out which these are.
extra/runner summary report: Fix jerky width change of details pane

Bootstrap's "affix" jQuery plugin started having an annoying behaviour
after baeb752c, where the width of the "details" iframe is different
when the window is at the top-most position, than when you scroll down
slightly.

"affix" is designed for fancy websites where an element moves normally
with the document as you scroll, but then "sticks" at the top once
you've scrolled enough. This is overkill for our needs, and a simple
"position: fixed" does the trick, without the flicker.
extra/runner summary report: Update "details" pane's height on window resize

Otherwise if you shrank the window, you wouldn't be able to scroll the
details pane; and if you grew the window, the details pane wouldn't take
up the full available height (until you selected a new row from the
table).

Also, the height calculation takes into account the 40-pixel-high black
title bar at the top of the window.
make doc: Don't mention parent class "object" in API documentation

Otherwise the API documentation (which is generated programmatically
into README.rst) would say:

    class MatchParameters(__builtin__.object)

instead of:

    class MatchParameters

ever since 65a38380. (I hadn't re-run `make doc` since 65a38380, which
is why the above change hadn't made its way into README.rst).
README.rst: Minor formatting change to reflect 65a38380

This commit is the result of running `make doc`, which updates the API
documentation in README.rst from the docstrings in stbt.py. I had
forgotten to run `make doc` when I made the changes in 65a38380.
Bump stb-tester version to 0.16

Note that the version number in the RPM spec file was already bumped in
2dfc88c2.