Revert "Updates for upcoming changes in pypy stdlib paths"

This reverts commit c3bb465cc3c3fb069c85fde7f23dbf9e4063ee0b after
receiving advice from Maciej Fijałkowski.
note that --extra-search-dir is broken
update changelog
upgrade to distribute-0.6.36
Merge pull request #417 from qwcode/distribute_0.6.36

upgrade to distribute-0.6.36
update changelog