* Split up the thirdparty code into the thirdparty folder (#3637)
* Create a new kimath static library containing all the math functions
This is part of cleaning the build system for #1906.
When the filename is not absolute, the page layout file is now searched first in project folder, and then in kicad template folder, if not found in project.
Eeschema: one string with a bad char (\a, not useable in internationalized strings).
Dialog_page_settings: use not translated strings in code, so strings can be freely translated for the UI.
(Initial code was not working with existing translations)
Update 2 icons.
sizes. Tested with postscript output only. Required minor file format changes
to reflect the "portrait" setting. common/dialogs/dialog_page_settings.cpp
uses a checkbox but its name is "Landscape", which is inverted from portrait,
but since it is the more common choice, I used that rather than portrait.
The tooltip for that checkbox makes it clear. No portrait mode is supported
for "User" paper size.
* Move schematic wire and bus break code into schematic screen object.
* Move schematic test for dangling ends into schematic screen object.
* Remove left over debugging output in schematic screen object.
* Remove unused file eeschema/cleanup.cpp.
* Fix bug in schematic line object hit test algorithm.
* Fix a string concatenation compile error added in r2752.
* Rename class WinEDA_BasicFrame to EDA_BASE_FRAME.
* Rename class WinEDA_DrawFrame to EDA_DRAW_FRAME.
* Rename class WinEDA_DrawPanel to EDA_DRAW_PANEL.
Ian McInerney
Jeff Young
jean-pierre charras
Simon Richter
Lorenzo Marcantonio
Alexander Zakamaldin
Dick Hollenbeck
Wayne Stambaugh
charras