defined to produce junk.
Any comparison involving junk triggers the i status register.
Any conditional jump triggered when the i register is true,
triggers a python level exception.
Added checks in compareVal to set status-keys l and e to signify
respectively 'lower than' and 'equal to'.
Added the following control flow operations:
* jl (less than)
* je (equal to)
* jge (greater than or equal to)
* jle (less than or equal to)
* jne (not equal to)