Pass the name of the transistor instead of guessing it from the conn.

Signed-off-by: François de Metz <francois@stormz.me>
Rename find fun to find_or_start.

Signed-off-by: François de Metz <francois@stormz.me>
Rename filter to result_write.

Signed-off-by: François de Metz <francois@stormz.me>
Add Funnel.Transistors to supervise Funnel.Transistor.

Signed-off-by: François de Metz <francois@stormz.me>
Merge pull request #3 from francois2metz/supervise_transistors

Add a supervision tree for transistors.