switch to use lodash 'contains' so that partial matches are not incorrectly returned.

see Issue 76 - $in query runs partial match

Issue #76 - change from using lodash contains to mockgood util contains
change util contains to iterate over array using lodash some and perform equality check using string representations of objects
merging tests
Merge branch 'bug/76-partial-match-in' of https://github.com/davidcollie/Mockgoose into davidcollie-bug/76-partial-match-in

Conflicts:
	lib/utils.js
	test/operations/comparison/InOperation.spec.js
Merge branch 'davidcollie-bug/76-partial-match-in'
1.10.5