Append require.extensions to extlist defaults

It seems like a good idea to append extensions found on require.extensions to exlist, this allows requiring modules like `js-yaml` right before `express-load` to load yml files also.
Adding ignore option by regEx
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Arrumando bizarrice didática
Merge pull request #17 from victorsenam/master

Adding ignore option by regEx
Merge pull request #11 from reaktivo/patch-1

Append require.extensions to extlist defaults
merge the lastest
bump 1.1.9
cwd document