tycho to 0.19.0

pom.xml

@@ -24,7 +24,7 @@
     <properties>
       <lab.repository.eclipse>http://download.eclipse.org/releases/indigo</lab.repository.eclipse>
       <lab.repository.dependencies>http://download.digital-humanities.de/updates/repository</lab.repository.dependencies>
-		    <tycho-version>0.16.0</tycho-version>
+		    <tycho-version>0.19.0</tycho-version>
 		    <lab.repository.root>http://download.digital-humanities.de/updates/textgridlab</lab.repository.root>
 		    <lab.repository.core>${lab.repository.root}/core</lab.repository.core>
     </properties>