handle singleton mixins (A.extend B)
fix for edge Rails
cleaned up directory structure of test constant source files
added a failing test for mixin chain
added tests for update of ActiveRecord-related references
made all tests pass
removed temporary test code
Made progress on making the tests pass. Little to go.
Added failing tests. Working on them.
renamed SelectiveConstantUnload to RailsDevelopmentBoost, following t…
…he repository renaming from selective-constant-unload to rails-dev-boost
Apply monkey patches earlier in the boot process. Fix the detection o…
…f constants defined by loaded files. Index loaded files by a path that is marked as loaded, in order to properly unmark it later.