Merge branch 'wxm-install-package-xml' into 'devel'

Install package.xml

See merge request !25

CMakeLists.txt

@@ -53,3 +53,6 @@ IF(NOT INSTALL_PYTHON_INTERFACE_ONLY)
   INSTALL(DIRECTORY robots/hector_description DESTINATION share/${PROJECT_NAME}/robots)
   INSTALL(DIRECTORY robots/double_pendulum_description DESTINATION share/${PROJECT_NAME}/robots)
 ENDIF(NOT INSTALL_PYTHON_INTERFACE_ONLY)
+
+# Install catkin package.xml
+INSTALL(FILES package.xml DESTINATION share/${PROJECT_NAME})