Pathing fixes for Windows
fix the unlink test to be a little more robust
* file delete on windows is not guarenteed to happen at the api call, lazy delete
improve the loading of the default certificates

* see https://github.com/joyent/node/commit/a12870c823b9b67110b27a470fcac342cf1dfbd6
Merge pull request #467 from luvit/fixes/certs

improve the loading of the default certificates
fix test-http-parse-error.lua to be a little more concise

* fixes the test on windows
Merge pull request #466 from rjemanuele/fixes/pathing

Pathing fixes for Windows
export path_base module within luvit_exports
fix(streams): close the filedescriptor when the stream ends
emit an error if write is called after closed
whitespace fix
Merge pull request #472 from luvit/fix/stream_close

fix(streams): close the file descriptor when the stream ends
add release notes
Merge pull request #474 from luvit/release/0.8.1_notes

add release notes for 0.8.1
fix utils.dump infinite loop on 32bit
Merge pull request #475 from luvit/fixes/util_dump

fix utils.dump infinite loop on 32bit