Bug 409601: Ask for an email instead of a username (since Weave usernames are email addresses)

services/sync/locales/en-US/login.dtd

@@ -1,6 +1,6 @@
 <!ENTITY dialog.title                 "Mozilla Services Login">
 <!ENTITY dialog.label                 "Sign in to Weave from this computer.">
-<!ENTITY username.label               "Username:">
+<!ENTITY username.label               "Email:">
 <!ENTITY password.label               "Password:">
 <!ENTITY encryptionPassphrase.label   "Encryption Passphrase:">
 <!ENTITY savePassword.label           "Save password on this computer">

services/sync/locales/en-US/wizard.dtd

@@ -16,7 +16,7 @@
 <!ENTITY step3.counter                    "Step 3 of 5">
 <!ENTITY step3.title                      "Account Details">
 <!ENTITY step3.description                "Please enter the Weave account details and click the &quot;Verify&quot; button to validate before proceeding.">
-<!ENTITY username.label                   "Username:">
+<!ENTITY username.label                   "Email:">
 <!ENTITY password.label                   "Password:">
 <!ENTITY encryptionPassphrase.description "You must also now choose an encryption passphrase that is different from your password. This will be used to protect your data on the server.">
 <!ENTITY encryptionPassphrase.label       "Encryption Passphrase:">