Gerbview: remove useless calls to SetToolbar() which create horizontal toolbar flicker under Windows.

Gerbview: fix an issue with gerber files having a line comment starting by G04 and a command after this comment, on the same line.

Fix issue with new layer box, mainly with wxWidgets 2.9.1, minor code cleanup. Uncrustify class_layerchoicebox.cpp

Pcbnew: try to fix an old bug (when moving the Layer manager window) without recreate bug size MsgPanel

Cvpcb and Gerbview: move dialog files in dialogs/.
Eeschema: fix bug in libedit: crashes with import a symbol.

Fix bug in PolyLine.cpp, Fix bug in DRC calculations (see changelog). Cvpcb: move dialog files in dialogs/

Eeschema: converted plot PS dialog from Dialogblocks to wxFormBuilder Fixed a minor bug when plotting shapes with filled in background option. Pcbnew: Added locked modules block patch

Gerbview: support for plot lines (currently: not arcs) with a rectangular pen (Yes, it exists!). pcbnew: try to fix an issue when exporting arcs in gencad.

Libedit: fixed draw artefacts when editing a graphic symbol. fixed minor issues in undo and abort commands when editing graphic items.