Realized that os_call handling needs a complete interface redesign. checking in compilable intermediate state.
Restructured function call handling. Needs testing.
Adding debug messages to fifo module.
 Adding debug messages to sort module
Improved documentation and error reporting.
Rename of function call dump.
Fixed pointer bug in shadow_func_call_pop.
Extended shadow framework to work with reconos queue function calls. Sort demo with rqueues does work now.