secularmultiple: update with github version

[ipelupessy]

currently secularmultiple is broken unless compiled with -O0.
secularmultiple is available on github seperately now with some fixes; it should be updated in amuse.
it can be linked to this repo in the manner of other download_codes.
interface has changed, but I think it can be replaced easily (mainly work on interface.py)
suggest @hamers takes alook at it?

[ipelupessy]

@hamers so I started a bit #557

[ipelupessy]

commit 8a24874 fixes some of the seg faults..its the functions w/o return that cause the segfaults..I still think update and linkage with the current git version is a good idea...

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 28 days if no further activity occurs. Thank you for your contributions.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 28 days if no further activity occurs. Thank you for your contributions.

[ipelupessy]

certainly not completed