v2.6.0

Modified the command-line tokenization logic to try to split unknown secondary flag arguments into multiple secondary argument flag tokens (one for each character of the unknown flag).

Example: If the program defines an argument with a secondary name v, then -vvv would be equivalent to -v -v -v, unless the program also defines a -vvv argument.

Additional:

• Added support for declaring the program version
• Optimized argument lookup during argument tokenization and parsing stages