DOC: adjust example to use joblib
DOC: change example in sandbox try_smoothers.py
DOC: add kernel_regression example scripts
REF/BUG: add W in KernelCensoredReg, add example with random censoring
DOC for BUG: example bw='aic' first bw is negative and too small in absolute terms
ENH: add sortindex so we can reverse sorting
ENH: dgp_examples, some example functions and processes
ENH: improve nonparametric/dgp_examples with script
REF: remove original class, now obsolete
DOC: move examples out of dgp_example
DOC: docstrings dgp_examples
ENH: add example from ex_kernel_regression3 to dgp, add heteroscedasticity
REF: rename dgp base class, add seed in example
DOC: add to nonparametrics.rst, fix Latex and some sphinx errors
REF: dgp_examples, don't sort if x is given
BUG: fix SingleIndex, results look roughly reasonable in example
REF: singleindex change sign back, I don't know which is right (or if it matters)
REF/DOC: fix subclassing of dgp, nice example for SingleIndex (seed and smaller noise)
BUG: SemiLinear, similar fixes as in SingleIndex (only checked with one example)
DOC: example for checking SemiLinear fix in previous commit