Running sequencer on Windows unsuccessfull

[RandomCraftr]

Hello,

attempt at running sequencer on windows raise multiple issues.

• scale_list not being passed by default, it is computed at instanciation starting line 94 - sequencer_.py. Array is then numy.int32 even on x64 Windows with x64 Python installed. Than assertion line 180 fails.
• scale_list being explicitly passed through argument as numpy.int64 casted array, line 76 fails because of scale_list != None

Proposition for resolution:

• when scale_list is computed, explicitly specify type it will be asserted against : l103 - self.scale_list = numpy.array(scale_list, dtype=numpy.int64)
• when scale_list is tested whether being passed as argument or not, prefer "is not None" instead of != None"

[RandomCraftr]

Same kid of issue at line 902 of sequencer_.py.
ordering_bfs = numpy.array(ordering_bfs).astype(numpy.int)
is proposed to be replaced by:
ordering_bfs = numpy.array(ordering_bfs).astype(numpy.int64)