Added Array created in another document test
Added support for arrays created in different document for `_.isEqual`
Removed the areArray check from the already convoluted `if` check for clarity as suggested by @jdalton
Underscore 1.7.0
Merge pull request #1799 from akre54/release-170

Release Underscore 1.7.0
Underscore 1.7.0 -- #1799
index tweaks
fix some backtick syntax from my head being in markdown land
Add a navigational link to the sidebar for _.before
Added navigation link on sidebar for _.noop
Merge pull request #1801 from dreyacosta/master

Added navigation link on sidebar for _.noop
document some things missed before
Merge pull request #1803 from akre54/doc-fixes

document some things missed before
add note to changelog about _.union and _.difference only accepting arrays
fixing unclosed tt
(re)Add _.unzip
Merge pull request #1806 from megawac/unzip

(re)Add _.unzip
Spec various chain functions and tests for #397
Minor optimization of result
Fix test linting error

(my bad)