add possibility to set property value (v 2.7.0)

* add PHPTAGS_STACK_HOOK_TYPE
* add function Compiler::stepFunction()
* add function Compiler::stepFunctionFromVariable()
* refactoring function Hooks::callHook()

Change-Id: I5ef1406b51e137b96359a3403b06f512578a5e82
Merge "add possibility to set property value (v 2.7.0)"