Update invite strings.

// FREEBIE

Closes #2735

res/values/strings.xml

@@ -111,7 +111,7 @@
     <string name="ConversationActivity_transport_insecure_mms">Insecure MMS</string>
     <string name="ConversationActivity_transport_textsecure">TextSecure</string>
     <string name="ConversationActivity_get_with_it">Get with it: %s</string>
-    <string name="ConversationActivity_install_textsecure">Install TextSecure: %s</string>
+    <string name="ConversationActivity_lets_use_this_to_chat">Let's use this to chat: %s</string>
     <string name="ConversationActivity_error_leaving_group">Error leaving group...</string>
 
     <!-- ConversationFragment -->

src/org/thoughtcrime/securesms/ConversationActivity.java

@@ -343,14 +343,9 @@ public class ConversationActivity extends PassphraseRequiredActionBarActivity
 
   private void handleInviteLink() {
     try {
-      if (!TextUtils.isEmpty(composeText.getText()) &&
-          !composeText.getText().toString().endsWith(" "))
-      {
-        composeText.append(" ");
-      }
       boolean a = SecureRandom.getInstance("SHA1PRNG").nextBoolean();
-      if (a) composeText.append(getString(R.string.ConversationActivity_get_with_it, "http://sgnl.link/zhrzvk6"));
-      else   composeText.append(getString(R.string.ConversationActivity_install_textsecure, "http://sgnl.link/1yKYqoN"));
+      if (a) composeText.appendInvite(getString(R.string.ConversationActivity_get_with_it, "http://sgnl.link/1IvurmD"));
+      else   composeText.appendInvite(getString(R.string.ConversationActivity_lets_use_this_to_chat, "sgnl.link/1CYCQQN"));
     } catch (NoSuchAlgorithmException e) {
       throw new AssertionError(e);
     }

src/org/thoughtcrime/securesms/components/ComposeText.java

@@ -6,6 +6,7 @@ import android.os.Build;
 import android.support.annotation.NonNull;
 import android.text.Spannable;
 import android.text.SpannableString;
+import android.text.TextUtils;
 import android.text.style.RelativeSizeSpan;
 import android.util.AttributeSet;
 import android.widget.EditText;
@@ -33,4 +34,12 @@ public class ComposeText extends EditText {
     span.setSpan(new RelativeSizeSpan(0.8f), 0, hint.length(), Spannable.SPAN_INCLUSIVE_INCLUSIVE);
     super.setHint(span);
   }
+
+  public void appendInvite(String invite) {
+    if (!TextUtils.isEmpty(getText()) && !getText().toString().equals(" ")) {
+      append(" ");
+    }
+
+    append(invite);
+  }
 }