Replace the namespace

• fix a bug
• add "PP_REQ_PLUGINS" opt, user can redefine the req plugins
• fix a bug when use cache
• exclude anonymous function
• update name
• rename PINPOINT_ENV to PINPOINT_USE_CACHE
• fix a bug when no $classMap definition
• Support function
• add User directory
• add ini loader
• add filter loader
• add New_ and funcCall
• support namespace hack
• update licence