Fix isEquals null check: check for constructor in the objects per @jdalton
Implements the _.property utility method

Higher-order function that returns a property of a given object.

Implementation based on the one proposed by @zhy0216 in #1345
Use _.property in _.pluck
Use _.property in lookupIterator
Implements the _. constant utility method

Higher-order identity function.

As proposed in #1345
Added an alias and refactored _.constant
Adds _.constant to the documentation page
Removes the _.const alias
Move null check into lookupIterator.
Ensure first handles negative numbers gracefully.
Adds the documentation for _.property
Comment for _.bindAll more accurately reflects its behavior
Add .editorconfig
add placeholder support to _.partial
New year!
assign value to new arrays at creation in _.groupBy
fixes #1390: make _.where consistent when used with empty attrs object
_.keys accepts non-object arguments.