Changes the Jakefile to work with node v0.10.x

Node introduced a breaking change in v0.10
where all FS module actions require a callback
to be passed.

This change simply passes an empty callback that
will swallow any errors passed in. Basically
keeping things the same as they were in node v0.8.x

Read More:
https://github.com/joyent/node/issues/5005
Merge pull request #187 from codeimpossible/node_0_10_x

Changes the Jakefile to work with node v0.10.x