Merge 'Update build to use Tycho 0.8'

Conflicts:
	org.eclipse.jgit.packaging/pom.xml

Change-Id: I248a72575ff23fecf7599c06517c909f43f95ee4

org.eclipse.jgit.packaging/pom.xml

@@ -59,7 +59,7 @@
   <name>JGit Tycho Parent (Incubation)</name>
 
   <properties>
-    <tycho-version>0.7.0</tycho-version>
+    <tycho-version>0.8.0</tycho-version>
     <eclipse-site>http://download.eclipse.org/releases/ganymede</eclipse-site>
   </properties>