further fixes on core

first shot on merging the core fro the int64 branch

Fast parameter parsing API

This API is experemental. It may be changed or removed.
It should be used only for really often used functions.
(Keep the original parsing code and wrap us

Fast parameter parsing API

This API is experemental. It may be changed or removed.
It should be used only for really often used functions.
(Keep the original parsing code and wrap usage with #ifndef FAST_ZPP)

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code cleanup

Refactored run_time_cache usage in object handlers

Wrong expectation in tests (for some reason backtraces contained invlalid extra frame at the top)

Simplify call-frame handling

Removed EG(active_symbol_table) and use corresponding value from EG(current_execute_data)

Removed EG(called_scope) and use corresponding value from EG(current_execute_data)

Uinified call frame handling for user and internal functions.
Now EG(current_execute_data) always point to the call frame of the currently executed function.

Refactored parameter passing mechanism.

In PHP-5.6 and below each argument passed to user function was copies on VM stack twice.
Now we always have ZEND_INIT_FCALL (or simular) opcode th

Refactored parameter passing mechanism.

In PHP-5.6 and below each argument passed to user function was copies on VM stack twice.
Now we always have ZEND_INIT_FCALL (or simular) opcode that pushes "call frame" on top of VM stack.
"Call frame" is actually the same zend_execute_data structure.
All the following ZEND_SEND instructions push arguments on top of the stack in a way that they directly comes into corresponding CV variables of the called frame. Extra arguments are copied at the end of stack frame (after all CV and TMP variables) on function enterance.

There are two minor incompatibilities:
1) It's not allowed to decalre functions redefining arguments e.g. "function foo($a,$a) {}".
2) func_get_arg() and func_get args() return the current value of argument and not the original value that was sent.

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Use arena allocator for zend_class_entry, zend_op_array and zend_property_info that live till the end of request

Fix align indentation

Use reference counting instead of zval duplication

cleanup

cleanup

Use new zend_hash API

Use specialized functions instead of macros

Optimize func_get_args() to build packed array

Fixed apply_func_args_t

Fixed apply_func_arg_t, and it's better not using cast (compiler friendly)

Use optimized zend_array_dup() function. convert zend_hash_num_elements() and zend_hash_next_free_element() into macros.

Save one type checking if the type is already string

Fix align indentation

zend_stack_top() now returns pointer directly