First cut of lazy need method generation.
Clean up method names for lazy needs evaluation.
[17.2ms] Still fast!
Fix specs after transitioning .needs from eager-rebuilding to lazy-rebuilding.
Complete specs around our new lazy-build model for 'needs' methods.
Update CHANGES and CONTRIBUTORS.
Make Fortitude support 'yield', 'yield_from_widget', and Erector's 'call_block' with (in order of preference): 1) blocks directly passed to 'widget', 2) blocks passed to the constructor, 3) the surrounding layout.
Merge branch 'ageweke/pass_blocks_to_widget'
Document addition of 'yield' support, and bump version to 0.0.9.