Add request store-retrive logic.
Revert "Add request store-retrive logic."

This reverts commit 43b371b3f40969d112f089d8eab5a4cafadcfd3e.
Check whether the symbol is function before addressing it.

When the import WebInterface::Controller code calls to
UNIVERSAL::isa as to code ref, it exploits it.
UNIVERSAL::isa is GLOB, no CODE. When calling it as code, undefined
function is created, so all calls to it will result in call to undefined
function and won't rich the code in GLOB.
Merge pull request #10 from wtertius/do_not_kill_UNIVERSAL_ISA_on_controller_import

Do not kill universal isa on controller import