WIP added benchmark case for FFT convolutions#29

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psteinb wants to merge 4 commits intomasterfrom

Commits on Apr 13, 2018

added benchmark case for FFT convolutions
Peter Steinbach
committed
ditched libbenchmark due to linking problems with this C++2003 project
Peter Steinbach
committed

Commits on May 4, 2018

added minimal benchmarking CLI interface
Peter Steinbach
committed
added docs on benchmark tool
Peter Steinbach
committed