lockdown passwordStretching parameters
Do some basic sanity-checking on submitting email addresses.
Add test for validation of email addresses.
Send verification code in query string, not url fragment.
Merge pull request #410 from mozilla/rfk/verify-code-in-query-string

Send verification code in query string, not url fragment.
Merge pull request #409 from mozilla/rfk/basic-email-validation

Add some basic email validation
updated example.js, added npm scripts
Merge pull request #403 from dannycoates/i401

lockdown passwordStretching parameters
Merge pull request #413 from dannycoates/i408

updated example.js, added npm scripts