Merge pull request #1 from dwittner/master

Fix for issue #258: toEqual goes into infinite recursion for cyclic data
Remove lodash dependency

This reverts commit 605df725b7a156573ef6b60454298e45b1011da0.
Merge pull request #2 from magnars/remove-lodash

Remove lodash dependency
Linting
Merge pull request #3 from magnars/linting

Linting
New version of cyclic comparison