Added WIP version of fast roping (#336)
fixed: could not add self iteractions with fn_addInteractionSelf

replaced "AGM_SelfInteractions" with  "AGM_InteractionsSelf" as that is how it is called in fn_addInteractionSelf
More work on #336
Merge pull request #1517 from aeroson/master

fixed: could not edit self iteractions with fn_addInteractionSelf and fn_removeInteractionSelf