Merge branch 'rs-signup-box-text' into 'master'

Improve wording below signup box

Before:

![Screen_Shot_2015-04-07_at_5.46.31_PM](https://dev.gitlab.org/gitlab/gitlabhq/uploads/a5433c7c423fd37cffe4c2352a833dcf/Screen_Shot_2015-04-07_at_5.46.31_PM.png)

After:

![Screen_Shot_2015-04-07_at_5.45.05_PM](https://dev.gitlab.org/gitlab/gitlabhq/uploads/46e13756a8dc389e6f87de0097433e36/Screen_Shot_2015-04-07_at_5.45.05_PM.png)

See merge request !1755

app/views/devise/shared/_signup_box.html.haml

@@ -22,5 +22,6 @@
 .clearfix.prepend-top-20
   %p
-    %span.light Did not receive confirmation email?
-    = link_to "Send again", new_confirmation_path(resource_name)
\ No newline at end of file
+    %span.light Didn't receive a confirmation email?
+    = succeed '.' do
+      = link_to "Request a new one", new_confirmation_path(resource_name)