Added support for method mocking.
This needs to be configurable, and kasaya needs to read the value from config file. Otherwise, it is a security leak.
log the message
Merge remote-tracking branch 'aya-dev/master' into dev

Conflicts:
	kasaya/core/client/exec_context.py
	kasaya/core/client/generic_proxy.py
	kasaya/core/client/proxies.py