Create _.assign function
Optimize isFunction only when appropriate.

Closes #1929.
Fix changelog for _.escape
Merge pull request #1940 from unrealsolver/master

Fix changelog for _.escape: function no longer escapes slash '/'
missing new on a typeerror
Merge pull request #1908 from thejameskyle/assign

Add _.assign function
Test typed arrays are functions
Add _.create method
Merge pull request #1907 from thejameskyle/create

Add _.create method
Alias? includes as contains
Merge pull request #1955 from megawac/includes

Alias? includes as contains
Remove `reduce` error throwing

Closes #1858.
Support fromIndex in _.contains
Improve invoke coverage
Merge pull request #1963 from megawac/invoke-cov

Improve invoke coverage
Use a version of phantomjs that doesn't compain about SOP
e.g. https://travis-ci.org/jashkenas/underscore/builds/43040393#L83
Merge pull request #1962 from megawac/from-contains

Support fromIndex in _.contains
Adds a test case when we call _.pluck() to objects passing an undefined property as an argument.
Merge pull request #1971 from shinnya/feature/add-pluck-test-case

Adds a test case when we call _.pluck() to objects passing an undefined property as an argument.
Add _.transform method