Canonicalise iterator receiver names

This apparently meaningless churn improves godoc readability.
Canonicalise leveldb receiver names

Also remove redundant LevelDB infix missed previously.
Canonicalise memstore receiver names
Canonicalise mongo receiver names

Remove redundant Mongo infixes that were miseed previously.
Canonicalise gremlin receiver names
Canonicalise mql receiver names

And again, remove a multitude of redundant infixes I missed previously.
Remove unnecessary import renaming
Merge pull request #31 from kortschak/names

Rewrite receiver names
Fix build by only testing Go >= v1.2
Merge pull request #32 from barakmich/master

Fix build by only testing Go >= v1.2
Fix the obvious copy bug
Canonicalize leveldb internal iterator
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
Fix #21 and change the MQL semantics slightly to match the original MQL
Add test for semantics from #21
Merge pull request #40 from barakmich/mql_bug_21

Fix #21 and test the correct semantics