Added a failing test to tree publishing.
Added sample command to Makefile.
Implemented tree publishing.
Added tree publishing.
Merge pull request #16 from jacebrowning/tree-publishing

Add tree publishing.
0.4
Fixed underline.
Added missing auto_load decorators.
Fixed load/save decorator order.
0.4.1
Fixed Item root path.
0.4.2
Fixed a test.
Fixed storage of 2-part levels ending in a multiple of 10.
0.4.3
Added a test showing the '--level' CLI
loading all items before yielding
Updated Makefile from a template.
Fixed typo
Added links to README.