ENH: Add entity print_tree function
ENH: Add transform option
STY: Remove unnecessary import
Merge pull request #384 from Eric89GXL/tree

ENH: Add entity print_tree function
WIP: mplexporter / pyplot interface
FIX: Py3k
FIX: Quieter nose
FIX: Cleaner example [ci skip]
WIP: Some text support [ci skip]
FIX: Fix text
ENH: Add Markers [ci skip]
FIX: Fix text size [ci skip]
FIX: Fix image
FIX: Fix size [ci skip]
FIX: Fix coords
ENH: Better example [ci skip]
FIX: Blocking [ci skip]
FIX: Fix after rebase [ci skip]
FIX: Fix image [ci skip]
FIX: Reorganize