[tutorial] add example code and figure for taggedFeatures
[tutorial] add taggedFeature example to tutorials.rst
Tag/MultiTag: add (retrieve_)feature_data
[tutorial] fixed links
Conflicts:
	docs/source/tutorial.rst
[tutorial] rename heading
[tutorial] add some intro to dimensions.
[test] test for multi_tag.retrieve_feature_data
[test] add test for tag.retrieve_feature_data.
[tutorial] fixed code-block bugs, reduced content tree depth to 1
Merge pull request #96 from jgrewe/tutorial

some more tutorial work... 

Awesome
Merge pull request #95 from jgrewe/retrieve_feature_data

Retrieve feature data

Cool!
[tutorial] some introductory words about tags...
Merge branch 'tutorial' of https://github.com/jgrewe/nixpy into tutorial
[tutorial] introductory words about types and names
[tutorial] finished tag and multi-tag snippets
[tutorial] add feature descriptions
[tutorial] brief descriptions of the source concept
[tutorial] add conceptual description of the metadata
[tutorial] link correction, corrected code-blocks
Merge pull request #98 from jgrewe/tutorial

Aaawesome