Merge pull request #19 from gmcintire/master

I fixed some minor typos & formatting issues on the API Subscriptions page
fix the documentation link to go to docs, not the blog
Add braintree_blue to the list of vaults in the current_vault example
Adding invoice billing
Merge pull request #20 from chargify/invoice_billing

Adding invoice billing
Invoice Billing fix
fix the coupons validate.json path/usage
Merge branch 'master' of github.com:chargify/docs.chargify.com
Which webhooks are fired during subscription import

Also lightened the code style for inline monospaced code
Fixed links to chargify
Removed beta label from Chargify Direct
Added new copy for Chargify Direct
update products create json / xml examples and doc
Specify that Braintree Blue "Customer ID" should be used for `vault_token`

During imports, merchants should use Braintree's "Customer ID" for the
`vault_token` value, rather than the "Payment Profile Token"
Merge pull request #21 from chargify/braintree_blue_imports

Specify that Braintree Blue "Customer ID" should be used for `vault_token`
change the hosted-page-settings doc so it doesn't say you can use POST to pre-populate the form
Merge branch 'master' of github.com:chargify/docs.chargify.com
Add total_revenue_in_cents to webhooks & api
Merge branch 'master' of github.com:chargify/docs.chargify.com

* 'master' of github.com:chargify/docs.chargify.com:
  change the hosted-page-settings doc so it doesn't say you can use POST to pre-populate the form
  Specify that Braintree Blue "Customer ID" should be used for `vault_token`
Added charge kind (subtype) descriptions