Make sure all modules are tested

.travis.yml

@@ -118,8 +118,8 @@ install:
   - if test -n "$PLUMED_MACPORTS" ; then ./.travis/config.macports.sh ; fi
 
 script:
-# we enable crystallization and manyrestraints modules
-  - CONFIG_FLAGS="$CONFIG_FLAGS --enable-modules=crystallization:manyrestraints:adjmat"
+# make sure all modules are enabled
+  - CONFIG_FLAGS="$CONFIG_FLAGS --enable-modules=all"
 # we enable fftw, which is off by default
   - CONFIG_FLAGS="$CONFIG_FLAGS --enable-fftw"
   - if test "$MAKEDOC" == yes ; then CONFIG_FLAGS="$CONFIG_FLAGS --enable-pdfdoc" ; fi