Added test for #625
test for nested lists with no text node in the item including the nested list
remove commented code -- thought there was another issue but there wasn't
inverted boolean. need more coffee.
suppress adding list prefix if children already have a prefix, #625
Merge branch 'nested_list_no_text_node_tests' of https://github.com/amro/DTCoreText into od/issue_625
Added writer round trip test for #625
Updated DTFoundation for Travis
Implemented basic round-tripping for nested lists
Added extra \n for empty list prefix analog to Safari #625
Merge branch 'od/issue_625' into develop