Re-enable ignore-protocol-version for backwards-compat with s-c-p.

Version 1.2.1.

README.md

@@ -12,7 +12,7 @@ Add Swank Clojure to your project as a development dependency to your
 project. If you are using Leiningen, add it to your project.clj file
 under :dev-dependencies:
 
-    :dev-dependencies [[swank-clojure "1.2.0"]]
+    :dev-dependencies [[swank-clojure "1.2.1"]]
 
 Once you run "lein deps" you can launch a swank server from the
 command line:
@@ -28,7 +28,7 @@ If you're using Maven, add this to your pom.xml under the
     <dependency>
       <groupId>swank-clojure</groupId>
       <artifactId>swank-clojure</artifactId>
-      <version>1.2.0</version>
+      <version>1.2.1</version>
     </dependency>
 
 Then you can launch a swank server like so:

project.clj

@@ -1,4 +1,4 @@
-(defproject swank-clojure "1.2.0"
+(defproject swank-clojure "1.2.1"
   :description "Swank server connecting Clojure to Emacs SLIME"
   :url "http://github.com/technomancy/swank-clojure"
   :dev-dependencies [[org.clojure/clojure "1.2.0-master-SNAPSHOT"]])

src/swank/swank.clj

@@ -20,6 +20,9 @@
            [java.io File])
   (:gen-class))
 
+(defn ignore-protocol-version [version]
+  (reset! *protocol-version* version))
+
 (defn- connection-serve [conn]
   (let [control
         (dothread-swank