Added option to prevent saving files to database.  Updated generator handling of save_db & rewrite arguments.  Minor style fixes & comment updates.  Chip-gen now supports --save-db option.

Added initial sphinx doc tree & build stuff.  Using the sphinx markdown theme.  Use 'make html' to build the docs.

Moved all generators into new folder.  Created idr generator.  Heavily updated module_generator to support having multiple final_result files.