Added constant volume plugin (partially)

Samo Penic

2019-03-08 77a2c7de0dd6563a30467fa2e73f02ec9f4c3deb

 configure.ac

@@ -52,5 +52,7 @@
AC_CHECK_FUNCS([pow sqrt strndup])

AC_CONFIG_FILES([Makefile
                 src/Makefile])
                 src/Makefile
       src/plugins/Makefile
      ])
AC_OUTPUT