point to secure intershpinx docs

Merge pull request lmfit#403 from lmfit/096_rc1_prep

096 rc1 prep

add conda-forge channel to installation docs

Merge pull request lmfit#353 from lmfit/prep094rc2

Prep094rc2

Merge pull request lmfit#343 from lmfit/prep0.9.4

Prepare 0.9.4

more doc tweaks

Merge pull request lmfit#315 from lmfit/issue314

refactor Model.set_param_hint()

Merge pull request lmfit#249 from andyfaff/emcee

ENH: adding an emcee sampler to Minimizer

Merge pull request lmfit#270 from lmfit/model_conf_interval

Model conf_interval

put setattr() in try/except