Revert "Be explicit about the charset of each table"

This reverts commit 53da2a67771ddb455a5d55244d96db5e9d2a7850.
Merge pull request #587 from chilts/revert-charset-in-schema

Revert "Be explicit about the charset of each table"
Firstly, promisify mailer() so we can turn it from sync to async
Fetch all localised templates from the fxa-content-server and use them
No need to pass i18n to mailer anymore
Remove email templates since now fetch from fxa-content-server
Pass email to the templating for substitution
Add content templates to the mail_helper.js to serve for us when testing
Use our own fake content server when testing
Add separate config files for various tests for local template server
Add a script to fetch all the current templates from a local fxa-content-server
Add a templateServer config item
First dump of templates
Read local templates first, then fetch remote ones
Make sure all tests pass by defining where the template server is
Remove win32
update vagrantfile and test/bench for new log lines
refactored single query functions in mysql
refactored mysql transaction functions
Add --user-id option to megabench command.