Kibot

Added
- iBoM output: file name patterns are allowed for the `netlist_file` option.
- File name patterns: %F is the name of the source file without extension, but
with the path.
- A hint for pip installations without using `--no-compile`.
- Support to field overwrite according to variant.
- Support to generate negative X positions for the bottom layer.
- A filter to rotate footprints in the position file (28).
- The step output now can download missing 3D models.

Changed
- Now position files are naturally sorted (R10 after R9, not after R1)
- Position files in CSV format quotes only the columns that could contain an
space. Just like KiCad does.

Fixed
- Now we support missing field names in schematic library entries.
- Generic filter `include_only` option worked only when debug enabled.

Added
- Internal BoM HTML: highlight cell when hover.
- Internal BoM HTML: allow to jump to REF of row number using anchors.

Fixed
- Internal BoM separator wasn't applied when using `use_alt`
- Problems loading plug-ins when using `pip`.

Added
- The KiBoM and internal BoM generators now support configuring the
separator used for the list of references.
- Help for filters and variants.
- Support for new `pcbnew_do export` options.
- Filters for KiBot warnings.
- Columns in position files can be selected, renamed and sorted as you
like.

Fixed
- KiBom variants when using multiple variants and a component uses more
than one, specifying opposite rules.
- Problems when using the `pdf_pcb_print` output and variants to remove
a component with ridiculous pads that only has solder paste (no
copper, nor even solder mask aperture).
- Excellon drill output when using unified output and not using default
KiCad names.

Added
- Now variants are separated entities. Two flavors implemented: KiBoM
and IBoM.
- New filters entities. They work in complement with variants.
All the filtering functionality found in KiBoM and IBoM is supported.
- Most outputs now supports variants. You can:
- Mark not fitted components with a cross in the schematic
- Mark not fitted components with a cross in the *.Fab layers of the
PCB
- Remove solder paste from not fitted components
- Remove adhesive glue from not fitted components
- Exclude components from the BoM (also mark them as DNF and/or DNC
(Do Not Change))
- Exclude components from the interactive BoM
- Remove not fitted components from the STEP file
- Exclude components from the position (pick & place) file
- Default output file name format and default variant can be specified
from the command line.

Fixed
- Virtual components are always excluded from position files.
Note you can change it using the variants mechanism.

Changed
- Discarded spaces at the beginning and end of user fields when creating the
internal BoM. They are usually mistakes that prevents grouping components.

Fixed
- The variants logic for BoMs when a component requested to be only added to
more than one variant.
- Removed warnings about malformed values for DNF components indicating it in
its value.
- Problems with PcbDraw when generating PNG and JPG outputs. Now we use a more
reliable conversion method when available.

Added
- More robust behavior on GUI dependent commands.

Changed
- Incorporated mcpy, no longer a dependency.

Fixed
- Problems when using `pip install` without --no-compile.
At least for user level install.