Use MySql pool, transactions and more promises
Make the MySql instance own the pool
Update loadtests to use new "preVerified" parameter.
Merge pull request #377 from chilts/issue-299-mysql-pooling-with-binary-take-2

Fixes: #299 - mysql transactions and pooling
re: my comments on #377
removed mysql from dev.json

Fixes #378
added mail_helper.js for local email testing
fixed annoying log lines with buffers
added recovery code log line to mail_helper
Merge pull request #379 from dannycoates/unlog

fixed annoying log lines with buffers
Merge pull request #380 from dannycoates/emailz

added mail_helper.js for local email testing
First, rough attempt at internationalization of emails.
Throw a proper error if i18n-abide doesn't work as we expect.
Fix pass-through of preVerified flag in account creation.
Don't put unused 'account' value in the handlebars template context.
Rename request.preferredLang => request.app.preferredLang
Merge pull request #365 from mozilla/email-i18n

Internationalisation of emails
Fix some jshint warnings.