Update pom to tycho 0.15, include SWTBot, update orbit version

Author: ralfstx

com.eclipsesource.jshint.releng/pom.xml

@@ -5,7 +5,7 @@
   <modelVersion>4.0.0</modelVersion>
 
   <properties>
-    <tycho-version>0.14.0</tycho-version>
+    <tycho-version>0.15.0</tycho-version>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
   </properties>
 
@@ -39,7 +39,12 @@
     <repository>
       <id>orbit-repo</id>
       <layout>p2</layout>
-      <url>http://download.eclipse.org/tools/orbit/downloads/drops/S20120123151124/repository/</url>
+      <url>http://download.eclipse.org/tools/orbit/downloads/drops/R20120526062928/repository/</url>
+    </repository>
+    <repository>
+      <id>swtbot-repo</id>
+      <layout>p2</layout>
+      <url>http://download.eclipse.org/technology/swtbot/helios/dev-build/update-site</url>
     </repository>
   </repositories>