* Added floating point validators for wxTextCtrl items relating to via and track sizes
* Prevent entering negative values
* Changed via option wxRadioButton pairs to wxCheckBox
* Toggling the OptAllowMicroVias checkbox toggles the enabled status of the microvia settings controls
* Cleanup of error message(s)
* Use default dialog size to allow sizers to do their job.
* General layout and sizer improvements.
* Remove HTML message window which could not be used when error dialog was displayed.
* Use wxStdDialogButtonSizer for the OK and Cancel buttons.
* Check for design rule validity in TransferDataFromWindow() to prevent dialog from being
closed and all new design rules being lost when an error is detected. This gives the user a
chance to fix any design rules errors before dismissing the dialog.
* Add missing test for extra via drill diameter violations.
* Remove unnecessary OK and Cancel butten clicked event handlers.
File "rules" has instructional text as comments near top.
2) Convert all text files in repo to LF line ending form.
Any checkout done with "rules" in play will convert the working
tree to native line ending, while keeping repo as LF line ending.
Design rules: increase number of vias and tracks sizes
Pcbnew: netlist reader: change from my recent commits to keep netnames in pads for footprints not in netlist
(allow an user to place some footprints by hand, set pads netnames and do not lost these netnames when loading a netlsit)
Fix other very minor issues.
Pcbnew: refresh issue with dialog designe rules under wxWidgets 2.9.2 under WINDOWS (replace wxChoiceBox by wxComboBox, should not change anything for users)
Eeschema: some issues in libedit (when editing a pin )