* Move code from function ClearProjectDrawList() into SCH_SCREEN object
Clear() method.
* Delete eeschema/delsheet.cpp as none of the code in it is ever called.
* Move global spice and net list command line variables into SCH_EDIT_FRAME
object as priviate members and provide access methods.
* Remove unnecessary header includes from eeschema/sheet.cpp.
* Minor coding policy fixes.
* Set default button on all dialogs that do not already have a defined
default button. The only exception is the EESchema net list dialog
which needs converted over to wxFormBuilder and due to it's design makes
setting the default button in any tab other than the default tab
problematic.
* Fix escape key dialog handling bug in EESchema print post script
dialog.
* All - add wxList implementation for dynamic declaration of application settings.
* EESchema: remove non-standard fonts and dialog button text colors from all UI controls.
* EESchema: update project file and application settings from static to dynamic method.
* EESchema: save and restore show hidden pins state between sessions.
* EESchema: global variable reductions.
* EESchema: use EVT_UPDATE_UI instead of SetToolbars() to set control states.
* EESchema: remove unused DialogBlocks BOM dialog project file.
* GerbView: remove non-standard fonts and dialog button text colors from all UI controls.
* GerbView: fix infinite loop when parsing RS274X aperture definitions with whitespace.
* GerbView: add file name to export to PCBNew select layer dialog.
Wayne Stambaugh
Charles McDowell
jean-pierre charras