* Allow <orientation> and <color> to work on group references
* Fix some corner cases where group bounds could be miscalculated
* Fix a corner case where MAME could incorrectly refuse to instantiate groups
* Add more checks to complay.py
* Document more of the layout format
* Clean up some corner cases in layouts with repeating blocks
* Make complay.py validate many more elements and attributes
* Make complay.py easier to use for just validating a layout
* Remove redundant view from Sega VMU layout
* Make buttons visually respond to input in whousetc.lay
* Add view with LED displays as well as terminal for aim65_40 and use repeats
* Clean up some outdated "game" terminology in clifront.cpp
* Initiaise a couple of members in tap/tun network module
* Start documenting layout format
