Log Message:
tex-circuitikz{,-doc}: update to 1.6.1

1.6.1
New components: solder jumpers; a couple of small but very useful
inversion markers for logical circuits, especially targeted at the
mux-demux family; a new inline microphone; a much more versatile `hemt`;
a better legacy `tline`. More tweaks to converters blocks, and a lot of
typo/grammar fixes in the manual.

- Add configurable dashes to the dc symbols in converter blocks
- Add solder jumpers
- Add a shape to mark european-style inversion, adjust European-style
  logic port triangle inversion symbols to match
- Add a tail-less mic  and an option to change the thickness of the
  microphone's bar
- Enhance the `hemt` shape with a GaN-hemt as example
- Add anchors and a "bare" option to `tline`
- subcircuits are no more experimental
- Correction of several typo/grammar errors in the documentation

1.6.0
The big change is the refactoring (and enhancement) of the block's code.
In addition, double gate MOSes, several fixes all over the map, and
quite a lot of anchors were added into the mix.

- Big change (mostly backward compatible, minus a couple of bug fixes) to the block's
  code.
    - Now `vco` can be `box`ed
    - enabled more short-name geographical anchors
    - generic blocks can be made rectangular
    - mid-way lateral anchors for all blocks, as well as up/down
    - renamed converters anchors (old ones retained for backward compatibility)
    - new ac/ac blocks, both single- and three-phase
- Added double gate MOS transistors (by Romano Giannetti)
- Fix deformed shape for legacy `TL` component ([issue on GitHub]
- Added several anchors on variable components, suggested by [Dr Matthias
  Jung]
- Added `genericsplitter` component (by [frankplow](github.com/frankplow))
- Fix - `splitter` used the wrong parameters (from `wilkinson`)