Updates to include and exclude different version tokens (EG-2517) && Ensures URL-safe base-64 encoding in PHP token generator (EG-3152)
Updayes README and sets default expiration for email token to one day.
Adds email token utility
Adds new terminology to Tokenizer class
Adds example implementation and invoice token utility
Updates README
Clean up layout of README
Clean up layout of README
Clean up layout of README
Clean up layout of README
More changes to README
More changes to README
More changes to README
More changes to README
More changes to README
More changes to README
More changes to README
Updates Readme to reflect behavior of the ruby client
Edit to README
Edit to README