Add ComputeIdealPoint attribute #262

Job	Run time
Julia 1 - windows-latest - x64 - pull_request	11m 57s
Julia 1 - ubuntu-latest - x64 - pull_request	10m 22s
Julia 1.6 - ubuntu-latest - x64 - pull_request	9m 19s
Julia 1.6 - ubuntu-latest - x86 - pull_request	10m 28s
	42m 6s

Provide feedback