Upgrade klayout to 0.26.6.
- Enhancement: Skip comment lines with // in RVE DB reader
- Bugfix: Doc fixes, better error messages on some Shape methods
- Bugfix: Using 64bit coordinates on RVE reader to avoid overflow
- Bugfix: Spice reader: .global should not add pin if the signal isn't used in a subcircuit
- Bugfix: A CIF reader and writer bug was fixed
- Bugfix: Perimenter can be included in antenna area for the antenna check. This also includes a mode in which only the perimeter is considered.
- Enhancement: A library can be associated with multiple technologies now.
- Bugfix: width of cell and library side panels could not be reduced below the width of the selection boxes in the header
- Bugfix: cell view selection header text did not get updated when saving the layout to a different file