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

some more tutorial work... 

Awesome