Merged (with some additional cleanup).

I implemented what Malte suggested in the e-mails, and pushed to my repository.

set_plan(...) saves the plan found, so that it is returned later by get_plan().

Code so far has been merged, but a few small issues remain (sent by email).

I added a command line parameter called --plan-file.
Note that the ./plan script needs to be adjusted.

Pushed to my repository.

There are 2 issues with the way plans are currently output:
1. The file name should be read from the command line (as per IPC rules)
2. When using iterated search, the plans should be output to different files, 
with .1, .2, ... appended.

I will implement this soon.

Jendrik - you will need to adjust your scripts to handle this.