[patch] Pre-release fixes

[Jules Bergmann]

Several small patches.

  - merged Nathan's patch to disable FFT with a patch to disable the old 
libraries,

  - made --with-ipp-suffix optional,

  - fixed a missing static definition when timers are disabled,

  - added checking to the IPP dispatch to check the operands have the 
same type.  It was matching an expression

	View<complex<float>> = View<float> * View<complex<float>>

but there was no corresponding IPP vmul wrapper.

  - reverse the order of parameters to IPP Subtract and Divide.

       ippsSub(A, B, Z, ...)

    is equivalent to

       Z = B - A

    go figure!

Patches applied.

These last two bugs were causing view-math to fail.  I'm checking that 
it is fixed now.  If it looks good, it will be our release 0.9!

					-- Jules