Clear old data on fetch

[andrewimm]

Handles Object.fetch() and Query results

[codecov-io]

Current coverage is 79.58%

Merging #206 into master will increase coverage by +0.14% as of ea98a49

@@            master    #206   diff @@
======================================
  Files           39      39       
  Stmts         3007    3012     +5
  Branches       719     721     +2
  Methods          0       0       
======================================
+ Hit           2389    2397     +8
- Partial        202     207     +5
+ Missed         416     408     -8

Review entire Coverage Diff as of ea98a49

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[drew-gross]

Seems to make sense. Integration tests sounds like a good idea, feel free to merge this before or after making those.

[andrewimm]

Integration tests run against the latest "master," so I'll merge now.