Iggy

Fixed
- Fix in opt_graph: auto generated inputs are now used for all experiments
- Fix the description of repair mode 1 (removing edges)

Changed
- iggy and opt_graph now display the auto generated inputs when using --autoinputs

Fixed
- Fix missing pyasp import.

Changed
- Use pyasp-1.4.3
Pyasp 1.4.2 has been broken so we had make an emergency release an update to the new version 1.4.3.
Older version of iggy wont install properly anymore.

Added
- Added level bound constraints.
Now one can add information about the initial state of a node to the experiment profile.
For example, the line
node1=MIN
states that node1 is initially at the minimum level (mostly that means absent).
The level bound constraint prohibits any solutions that predict a further decrease in node1.
Conversely, the line
node2=MAX
states that node2 is initially at the maximum level.
The level bound constraint prohibits then any solution that predict a further increase in node2.

Changed
- Use pyasp-1.4.1
- Port to python 3