Update to Debian stretch libraries.

CHANGELOG.md

+# Changes in version 2.?.? - 2017-??-??
+
+ * Major changes
+   - Update dependencies to versions available in Debian stretch:
+     Apache Commons Compress 1.13, Apache Commons Lang 3.5, Google
+     Gson 2.4, JUnit 4.12, Logback 1.1.9, SLF4J 1.7.22, and XZ 1.6.
+
+
 # Changes in version 2.0.0 - 2017-06-28
 
  * Major changes

build.xml

@@ -14,10 +14,10 @@
   <property name="jarpatternprop" value="empty" />
 
   <patternset id="runtime" >
-      <include name="commons-compress-1.9.jar"/>
-      <include name="gson-2.2.4.jar"/>
-      <include name="slf4j-api-1.7.7.jar" />
-      <include name="xz-1.5.jar"/>
+      <include name="commons-compress-1.13.jar"/>
+      <include name="gson-2.4.jar"/>
+      <include name="slf4j-api-1.7.22.jar" />
+      <include name="xz-1.6.jar"/>
   </patternset>
 
   <target name="coverage-check">

build @ b491c845

-Subproject commit e130139e1a551bcf3e6437a85799590600f4b096
+Subproject commit b491c845ab81027d2f29fe541f8303ff151d3d0b