Fix our versioning system.

pom.xml

@@ -14,6 +14,8 @@
     <junit.version>4.11</junit.version>
     <minecraft.version>1.6.4</minecraft.version>
     <minecraft_version>1_6_R3</minecraft_version>
+    <buildtag.prefix>git-Bukkit-</buildtag.prefix>
+    <buildtag.suffix></buildtag.suffix>
   </properties>
 
   <scm>
@@ -156,8 +158,8 @@
         <artifactId>gitdescribe-maven-plugin</artifactId>
         <version>1.3</version>
         <configuration>
-          <outputPrefix>git-Bukkit-</outputPrefix>
-          <outputPostfix></outputPostfix>
+          <outputPrefix>${buildtag.prefix}</outputPrefix>
+          <outputPostfix>${buildtag.suffix}</outputPostfix>
         </configuration>
         <executions>
           <execution>