Add some unit tests on TITLE_BLOCK
This commit also requires some mocks so the libcommon stuff
can work:
* Needs a Kiface() function to be linkable
* Needs some stuff from common to be build specially
* Needs to define itself as one of the unit-having programs
to appease the units defines.
* Add s-expression Format() function to all objects derived from
BOARD_ITEM.
* Add s-expression Format() function to base objects as required.
* Add functions to convert coordinates from base internal units
(nanometers) to millimeter string for writing to s-expression
file.
* Add temporary dummy conversion functions to prevent link errors
until schematic and board object and action code can be separated
into DSO/DLL.
* Add CMake build option to build Pcbnew with nanometer internal
units.
Seth Hillbrand
Jeff Young
John Beard
jean-pierre charras
Kristoffer Ödmark
Maciej Suminski
Simon Richter
Simon Wells
Lorenzo Marcantonio
Craig Southeren
Wayne Stambaugh
Dick Hollenbeck