* Remove unnecessary copy constructors from board and module library
objects.
* Add doClone() method to board and library objects.
* Add comment to class definitions where the default copy constructor
generated by the compiler was adequate.
* Replace copy method with clone method where applicable.
* Remove DuplicateStruct() function.
* Remove track object copy function.
* changed all the RotatePoint() functions in trigo.{h,cpp} to take a double as the
angle, which is still in tenths of degrees for now.
* EDA_TEXT::m_Orient is now double, still in tenths of degrees (for a short while),
but the double means parsing files and saving them use a different format string.
++pcbnew
* DRAWSEGMENT::GetStart() and GetEnd() do not operate for S_ARC like they used to.
They are now simply accessors for m_Start and m_End. Use DRAWSEGMENT::GetArcStart()
and GetArcEnd() and GetCenter() for arcs. specctra_export.cpp was the only
source file dependent on the old behavior.
* DIMENSION::m_Text is now contained, not dynamically allocated.
* more kicad_plugin work.
In common.cpp GetTimeStamp is renamed GetNewTimeStamp (a better name).
Pcbnew: prepare work to calculate connections between pads that inteserct and therefore can be connected without any track (composite pads).
Dick Hollenbeck
Wayne Stambaugh
jean-pierre charras