* organize recipes in subfolders, conda-recipes issue  https://github.com/pydata/conda-recipes/issues/67, https://github.com/pydata/conda-recipes/issues/54

https://github.com/pydata/conda-recipes/issues/54
```
@asmeurer 
This repo is getting a little out of hand. We need to organize the recipes
 at least a little. I recommend

    Python
    Non-Python
    Broken
```
Python and Non-Python may need to be split further.


https://github.com/pydata/conda-recipes/issues/67
```
@asmeurer commented 13 hours ago
But yeah, we would love to have a pull request here to implement this idea.
```

**This commit implements such:**
<i>1. allows conda recipes to be organized into subfolders</i>
```
    (recipes must be still unique names)
    /Recipes_Root
        /conda_standard
            /Recipe_conda
            /Recipe_python
        /customary_qt
            /Recipe_qt
            /Recipe_pyqt
        /conda_recipes_examples
            /Recipe_appdirs
            /Recipe_binstar_client
```
<i>2. allows optionally to configure the path to the conda-recipes folder through ..condarc option:</i>
that has the advantage that if one uses more than one conda: one can have a global recipe folder.