fix problem that complex64 wasn't supported.

In that case, the profile information are useless.

We don't want to hide this.

The setter isn't implemented and will raise an error.

Also fix the printing.

This fix a crash in the new memory profiler.

We print a message to use the new profiler in that case.
This repair ProfileMode

Change the mechanism to track in variable_shape instead of outputs_shapes.

It was the old memory profiler.

Err msg

fix reload and better error message

At worst, it would cause crash.

Add new commands to theano-cache.

"theano-cache basecompiledir purge" is useful when the kernel or Python
version changes, as cache directories accumulate.

Always put arch bitwidth in cache

Multiple mode

Also move local_bitwidth to gof/compiledir, import it directly in
theano.gof, and use the latter path.