Visual Studio 2015 is allowing users to take advantage of popular open-source package management and build tools for processing client-side resources. They suggest using NuGet primarily for managing .NET packages.
The recommendations are:
Package Managers: NPM and Bower
NPM
Use Node Package Manager to install and manage build tools and plugins to compile source into client-side optimized files. NPM files are stored in "node_modules" (hidden in the VS project). Configured using "packages.json".
Bower
Use the bower package manager to install and manage client libraries like "bootstrap", "jQuery", "angularjs". Bower files are stored in a folder named "bower_components" (hidden in VS project).
Configured using "bower.json".
Build Tools: GruntJS and GulpJS
Grunt
Grunt is a javascript task runner which allows you to setup build tasks to process your source into client-side ready resources. Use NPM to install grunt plugins that allow you to compose tasks (such as processing LESS or coffee files or minifying js and css). Configured through "gruntfile.js".
Gulp
Gulp is a "streaming build system". Similar to grunt but allows more advanced streaming tasks to be defined. Use NPM to install gulp plugins that allow you to compose tasks (such as processing LESS or coffee files or minifying js and css). Configured through "gulpfile.js".
Visual Studio 2015 provides some built-in support for these tools, including autocomplete for package names and version numbers. Visual Studio will check to make sure your packages are installed and up-to-date when you open the project. Finally there is the "Task Runner" UI which allows you to run grunt or gulp tasks manually or configure them to trigger on certain events.
This following post gives an introductory step by step guide to using these tools in Visual Studio 2015. Beyond that you should be able to search on NPM, Bower, Gruntjs or Gulpjs to find intro videos or blog posts to help you become more familiar with each.
http://www.asp.net/vnext/overview/aspnet-vnext/grunt-and-bower-in-visual-studio-2015