Merge pull request #32 from barakmich/master

Fix build by only testing Go >= v1.2
Remove trivial container/list usage
Remove uses of container/list
fix gremlin documentation for In and Both

this was likely a copy/paste from Out.
feel free to change the wording to fit your style.
Merge pull request #37 from jaywgraves/patch-1

fix gremlin documentation for In and Both
Merge pull request #36 from kortschak/remove-lists

Remove lists