mdwt,midwt enhancements#13

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mborgerding wants to merge 9 commits intoricedsp:masterfrom

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Commits on Feb 6, 2017

renamed mdwt.c to mdwt.cc
Mark Borgerding
committed
mdwt handles single input
Mark Borgerding
committed
complex works
Mark Borgerding
committed
mdwt,midwt now handle single|double , real|complex
Mark Borgerding
committed
refactoring dwt code
mborgerding
committed
continued refactoring
mborgerding
committed
{min,max} -> {MIN,MAX} to avoid collision with std::min,std::max
mborgerding
committed

Commits on Feb 7, 2017