Problems with tutorial transitions example

[jonpovey]

The documentation tutorial page section about transitions has several issues:

• bins as list-of-list does not work, throws TypeError: unhashable type: 'list' (works if changed to list-of-tuple)
• appending to addr_prev in the rel function causes the sample to be appended multiple times, once for each bin. The append needs to be moved to a separate xf to only happen once
• transition 0 1 2 3 bin cannot be hit as there is a 0 1 bin appearing before it, and inj is not set.

Also, inj does not work as documented, I had to explicitly set it to False to get this example to behave. See #63

[mciepluc]

A big miss out from my side.

[mciepluc]

thanks, fixed, don't agree with your last bullet however, check the created test for reference :)