Benchmark functions should (if possible) be tested in order

[kdodia]

It would be nice for scanfuncs to preserve order when scanning functions, although I will admit I don't know if this is possible.

According to the *.py scan—

funcs = pyclbr.readmodule_ex(name, [path])
funcnames = []
for key, val in funcs.items():
    if (any(key.startswith(prefix) for prefix in prefixes) and
            val.file == filename):
        funcnames.append(key)
return funcnames

—the functions are stored in a dictionary returned by pyclbr, which clobbers order. Thus, despite providing empty, small, and large benchmark functions in that order, the result generally will not be. Ex:

[eriknw]

Makes sense to respect the order specified by the user.

The function objects returned by pyclbr.readmodule_ex have a lineno attribute, so this should be straightforward to do. See documentation here: https://docs.python.org/2/library/pyclbr.html#function-objects

I believe the table printer sorts alpha-numerically as well, so that will need to be updated too (perhaps add an option).