Implemented basic typed list
Fixed comments and little formating error
Added get_item op.
Added append and extend.
Fixed errors and typos
fixed SliceType eq function
Fixed errors
Added constant input support for GetItem
Added non inplace append and extend
Added test for append and extend interfaces
Correction on Extend arguments
Merged inplace and non inplace append and extend
Added Insert Op

The inplace test for this fails for unknown reasons
Added remove op
Removed the double index setting (minor)
Optimized Remove op.
Merge pull request #1862 from Hengjean/TypedList

Implemented basic typed list with some basic op