1) circuit.cabal:
   - Added Circat.Examples & Circat.Netlist.
   - Added dependencies to netlist, verilog, netlist-to-verilog and netlist-to-vhdl
2) src/Circat/Circuit.hs: Removed examples and moved them to their own src/Circat/Examples.hs file
3) src/Circat/Examples.hs:
   - Now has the examles and provides the outAll function (previously in Circuit.hs)
   - outAll also write verilog along with the .dot and pdf files
   - Removed the invocation of the pdf viewer
4) src/Circat/Netlist.hs: Provides the toV function that converts circuits to verilog
Previous checkin had errors
Invokes acroread to view pdf files on linux systems
Added comments
Stopped passing the size field to ExprLit as it was causing emitting illegal verilog constructs. TODO file issue in github
1) Circuit.hs: changed `acroread` (for linux) to `display`
2) Netlist.hs: Refactoring based on conal's comment.
Added "xdg-open" as a comment
Merge pull request #1 from anshulmalvi/master

First cut with Circat/Netlist.hs which enables Circuit to Verilog netlist conversion.