Change interpretation of lists in Table.__getitem__ (closes #274)
Duck type when item in __getitem__ is not one of a few specified possibilities
Add tests and documentation for getting sub-set of columns with list of names
Re-introduce basic sanity check on slice in Table.__getitem__
Merge pull request #1454 from mhvk/table-getitem-with-list

Allow lists to select multiple columns in Table.__getitem__ (closes #274)