Merge pull request #1996 from mruz/2.0.0

Security getToken fix #1986 [ci skip]
Fixing namespaces, it needs more work [ci skip]
Fixing namespaces, it needs more work [ci skip] (2)
Fixing namespaces, it needs more work [ci skip] (3)
Changes required to fix zephir generate
Merge pull request #2051 from Cinderella-Man/2.0.0

Changes required to fix zephir generate
More namespace fixes, using latest zephir
Using latest zephir
Using latest zephir
Fixing internal method calls
Fixing internal method calls (2)
Missing SplPriorityQueue header