Improve dialog layout and fix UI policy issues with all of the dialog
boxes in the Gerbview and Pcbnew code paths.
Updated the use of component to footprint where appropriate.
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.
* Added a dialog to select options: one or 2 files, units (mm or inch), and force INSERT option.
* code cleaning
* Modify corresponding icon in menu to show a footprint, not a schematic component.