📝 Add a couple notes

src/module-cache.coffee

@@ -3,6 +3,9 @@ fs = require 'fs-plus'
 
 originalResolveFilename = Module._resolveFilename
 
+# Precompute versions of all modules in node_modules
+# Precompute the version each file is compatible
+
 Module._resolveFilename = (relative, parent) ->
   resolved = originalResolveFilename.apply(global, arguments)
   if relative[0] isnt '.' and not fs.isAbsolute(relative) and relative isnt resolved