ReadMe bug fixes and more examples

• Smushed some ReadMe code bugs.
• Filled in "advanced usage" section of ReadMe

Max cost as a function of Time, Memory and Parallelism

• Include "hashCost" (TimeCost * MemoryCost * Parallelism) on the Timing result
• Updated max cost based selector to use hashCost as first sort dimension, followed by compute time
• No longer throwing an error if maxTimeMs is too low, instead returning the fastest timing

Minor fixes

• ReadMe updates
• Friendlier default console output

First Public Release

This is the first public release of argon2themax.