• nodejs (npm) - http://nodejs.org/
• grunt - http://gruntjs.com/
• ruby - https://www.ruby-lang.org/
• sass - https://rubygems.org/gems/sass/
• git - http://git-scm.com/
• bower - http://bower.io/

1. Install Ruby.

2. Open "Start Command Prompt with Ruby", them enter the following commands:

   $ gem install sass
   

3. Close "Start Command Prompt with Ruby".

4. Install nodejs.

5. Open "Node.js command prompt", them enter the following commands:

   $ npm install -g grunt-cli
   $ npm install -g bower
   

6. Close "Node.js command prompt".

7. Install Git.

1. Open "Node.js command prompt" on project's dir, them enter the following commands:

   $ npm install
   $ grunt build
   $ grunt release
   

2. Close "Node.js command prompt".

3. Open "Git Bash" on project's dir, them enter the following commands:

   $ bower install
   

4. Close "Git Bash".

5. Enjoy! :)

First you need to install the proper node modules using npm install. Then to have grunt start watching for changes, run grunt dev