Remove ! slip-ups from English localization

PIALibrary/Resources/UI/iOS/en.lproj/Welcome.strings

@@ -11,9 +11,9 @@
 "login.password.placeholder" = "Password";
 "login.submit" = "LOGIN";
 "login.purchase.footer" = "Don’t have an account?";
-"login.purchase.button" = "Buy now!";
+"login.purchase.button" = "Buy now";
 "login.redeem.footer" = "Have a gift card or trial card?";
-"login.redeem.button" = "Redeem now!";
+"login.redeem.button" = "Redeem now";
 "login.restore.button" = "Couldn't get your plan?";
 "login.error.title" = "Log in";
 "login.error.validation" = "You must enter an username and password.";
@@ -25,7 +25,7 @@
 "purchase.email.placeholder" = "Email address";
 "purchase.submit" = "BUY NOW";
 "purchase.login.footer" = "Already have an account?";
-"purchase.login.button" = "Sign in!";
+"purchase.login.button" = "Sign in";
 "purchase.error.title" = "Purchase";
 "purchase.error.validation" = "You must enter an email address.";