Revert "Merge branch 'master' of https://github.com/chenqin/GraphQ"

This reverts commit c98629edaa44fede28c88007166b7925891ae5c3, reversing
changes made to 2f45cce17f32d77bffdbfa036bfc7da6891a3ec6.
Revert "Revert "Merge branch 'master' of https://github.com/chenqin/GraphQ""

This reverts commit 55395ff20fe60fd4d2c9913c324287c3953d78ca.
Revert "Revert "Revert "Merge branch 'master' of https://github.com/chenqin/GraphQ"""

This reverts commit a11fbe29467eaf24bf4e55e60883128cc36746a1.