EESchema code refactoring and coding policy naming fixes.

* 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.

pcbnew/moduleframe.cpp

@@ -243,7 +243,7 @@ WinEDA_ModuleEditFrame::~WinEDA_ModuleEditFrame()
      * the last edited item
      */
     SetBaseScreen( NULL );  /* Do not delete (by the destructor of
-                             * WinEDA_DrawFrame) the PCB_SCREEN handling
+                             * EDA_DRAW_FRAME) the PCB_SCREEN handling
                              * g_ModuleEditor_Pcb
                              */