Doc: documentation for find methods
[doc] Enable intersphinx and add mapping for py2.7 + numpy
[doc] DataArray/DataSet: add docs for various missing items
Merge pull request #39 from gicmo/doc_dataarray

Add docs for various DataArray, DataSet items

The documentator strikes again!
DataArray: create_data: accept array-like data not only ndarray
Merge pull request #40 from gicmo/create_data_array_like

DataArray: create_data: accept array-like data not only ndarray

Thanks
Merge pull request #41 from stoewer/master

Doc: documentation for find methods

Hodor, hodor, hodor!