Patch - Wait before exiting iterator due to minor eigenvalue change

Small patch to iterator/itermain function. If the initial eigenvalue is close to the target, then the change between the first and second parameter may be small. This causes the second eigenvalue to be very similar to the first, and raised an exit. The linear iteration variable update moves on past this, and the third iteration variable will experience more of a change, thus causing a more noticeable change in eigenvalue for well defined problems.

This bug has been squashed by simply increasing the required iteration wait times by one.