Update demos. Fix  pspice netlist issues when using ( and ) in net names ( parenthesis are replaced by underscore) .

   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.

set svn:eol-style property to native for all ascii files to support cross platform development