Allow glob patterns in loadEagerly setting, add dontLoad setting
Use node.js private module resolution routines; support nested node.js module dependencies
Handle primitive-!type spec in def files
Basic Underscore.js defs file
Remove references to `exports` (should be to `_`)
Merge branch 'Underscore_defs' into Backbone.js_plugin
add extends2 test of backbone-like extend func