fixed missing translation on the signup and invitation accept pages

app/views/invitations/edit.html.haml

@@ -7,7 +7,7 @@
   %br
   %br
   %h1
-    = t('users.getting_started.welcome')
+    = t('welcome')
   %h3.accept_invitation_text
     = t('.accept_your_invitation')
   - flash.each do |name, msg|

app/views/registrations/new.html.haml

@@ -8,7 +8,7 @@
   %br
   %br
   %h1
-    = t('users.getting_started.welcome')
+    = t('welcome')
   %h3.accept_invitation_text
     = t('.sign_up_message')
   - flash.each do |name, msg|

config/locales/diaspora/en.yml

@@ -38,7 +38,7 @@ en:
   all_aspects: "All Aspects"
   no_results: "No Results Found"
   _contacts: "Contacts"
-
+  welcome: "Welcome!"
 
   #for reference translation, the real activerecord english transations are actually
   #in en-US, en-GB, and en-AU yml files