B) CLI path and parsing improvements.

[yo1dog]

This PR is child of #28. To see diff with parent:
yo1dog/gekkoboot@yo1dog/prep-code-reorg...yo1dog/cli-parsing

• Improves the algo used to parse CLI option strings.
  • Now ignores insignificant white space.
• Improves logic for generating CLI filepath.
  • Now checks if DOL filepath ends with .dol before replacing last 3 characters with cli.

Rather than simply looking for line EOL characters, this algo tracks the position of the first and last non-whitespace character seen. Once an EOL or NULL character is found, we use the first and last non-whitespace characters to define the argument. Then state is reset.