CLN: extra line from previous eval changes
ENH: enable cython code for float64index
TST: Float64Index now has float64 dtype
ENH: enable Float64IndexEngine in index.py
API: add __contains__ to Float64HashTable
ENH: add lib.ismember_nans for Float64Index membership testing with nans
ENH: implement Float64Index-specific Index functionality
TST: make sure we test for float64 types instead of object
TST: clean up a test and compare return values instead of just making sure the indexing op does not fail