Added first-run infographic screens for IT2Me and Me2Me.

remoting/webapp/_locales/en/messages.json

 {
   "ACCESS_CODE": {
     "message": "Access code",
     "description": "Label for the access code entry box. This is where the client user enters the code that permits access to the host."
   },
   "ACCESS_CODE_TIMER": {
     "message": "This access code will expire in $timeout$",
     "description": "Text displayed when the access code is due to time out within 30 seconds.",
     "placeholders": {
       "timeout": {
@@ skipping 164 matching lines @@
     "description": "Error displayed when the service returns a 503 error. Such errors are usually temporary, and resolve themselves in about 30 seconds."
   },
   "ERROR_UNEXPECTED": {
     "message": "An unexpected error occurred. Please report this problem to the developers.",
     "description": "Error displayed in situations where things go wrong in ways not anticipated by the developers. There is typically no user-workaround to suggest, other than reporting the error so that we can investigate further."
   },
   "FOOTER_WAITING": {
     "message": "waiting for connection\u2026",
     "description": "Footer text displayed at the host after an access code has been generated, but before a client connects."
   },
+  "GET_STARTED": {
+    "message": "Get started",
+    "description": "Button displayed underneath explanatory text for app features. Clicking causes the text, infographic and the button itself to be replaced by the actual UI for that feature."
+  },
   "HELP": {
     "message": "Help",
     "description": "Help link, displayed in the top-left (assuming ltr layout) corner of the main screen. Clicking this takes the user to our FAQ."
   },
   "HOME_ACCESS_BUTTON": {
     "message": "Access",
     "description": "Clicking this button starts the desktop access process."
   },
   "HOME_ACCESS_DESCRIPTION": {
     "message": "See and control a shared computer.",
@@ skipping 36 matching lines @@
     "description": "In the connection history dialog, clicking this button shows only recent connections to this computer."
   },
   "INSTRUCTIONS_SHARE_ABOVE": {
     "message": "To begin sharing your desktop, give the access code below to the person who will be assisting you.",
     "description": "Instructions shown above the access code when it is ready to be conveyed to the client."
   },
   "INSTRUCTIONS_SHARE_BELOW": {
     "message": "Once they enter the code your sharing session will begin.",
     "description": "Instructions shown below the access code when it is ready to be conveyed to the client."
   },
+  "IT2ME_FIRST_RUN": {
+    "message": "User-to-user screen sharing—perfect for remote technical support.",
+    "description": "Description of the 'IT2Me' remote support functionality, displayed until the user clicks a 'get started' button, at which point it is replaced by the actual UI for that functionality."
+  },
   "LABEL_CONNECTED": {
     "message": "Connected:",
     "description": "String displayed in front of the host when a connection is active informing the client user who they are connected to."
   },
+  "ME2ME_FIRST_RUN": {
+    "message": "Access your own computer from anywhere.",
+    "description": "Description of the 'Me2Me' remote access functionality, displayed until the user clicks a 'get started' button, at which point it is replaced by the actual UI for that functionality."
+  },
   "MESSAGE_GENERATING": {
     "message": "Generating access code\u2026",
     "description": "Text shown while generating an access code."
   },
   "MESSAGE_SESSION_FINISHED": {
     "message": "Your Chromoting session has ended.",
     "description": "Message displayed when the client or host has disconnected."
   },
   "MESSAGE_SHARED": {
     "message": "Your desktop is currently being shared with $user$.",
@@ skipping 97 matching lines @@
   },
   "TOOLTIP_RENAME": {
     "message": "Edit computer name",
     "description": "The tool-tip shown when the user hovers over the 'rename host' button. Clicking this button allows the host name to be edited in-place."
   },
   "WARNING_NAT_DISABLED": {
     "message": "NOTE: Policy settings permit connections only between computers within your network.",
     "description": "Message displayed at the bottom of the host screen if local policy dictates that NAT traversal is disabled, meaning that connections outside the local network will not work."
   }
 }