seeker: fix new line delim's by using string streams
arith: make all functions take a long double array as input
Revert "arith: make all functions take a long double array as input"

This reverts commit afc5757b6156186474b5c5064421f619c4b16840.

Not the right way to do this. There has to be a better way.
seeker: add function calling support (always a WIP)