print more info about the VM that is testing our code.

.travis.yml

@@ -27,7 +27,9 @@ script:
   - export THEANO_FLAGS=warn.ignore_bug_before=all,on_opt_error=raise,on_shape_error=raise
   - python --version
   - uname -a
-  - free
+  - free -m
+  - df -h
+  - ulimit -a
   - echo $PART
   - theano-nose $PART