Binded SVD in the python level and documented

Implemented the signal standarization. The signs of U and V is defined analysing the first element of U.
If U[0, 0] < 0 then U=-1*U and V=-1*V
With that we have a consistent SVD binds along different implementations (http://prod.sandia.gov/techlib/access-control.cgi/2007/076422.pdf)
12 jobs for 8-bind-svd in 5 minutes and 33 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
passed #42069
conda-linux
build_linux_27

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passed #42071
conda-linux
build_linux_34

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conda-linux
build_linux_35

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conda-macosx
build_macosx_27

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passed #42072
conda-macosx
build_macosx_34

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passed #42070
conda-macosx
build_macosx_35

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  Test
passed #42079
conda-linux
test_linux_27

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99.0%
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conda-linux
test_linux_34

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passed #42075
conda-linux
test_linux_35

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99.0%
passed #42076
conda-macosx
test_macosx_27

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99.0%
passed #42078
conda-macosx
test_macosx_34

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99.0%
passed #42080
conda-macosx
test_macosx_35

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99.0%