Connecting MavensMate to an existing Force.com (non-MavensMate) project

Required project structure (the project must have a src directory with a valid package.xml inside):

MyCoolProject
    /src
        package.xml

Project located on your local filesystem

1. Drag directory into Sublime Text
2. Right click the project root in the Sublime Text sidebar
3. Select MavensMate > Create MavensMate Project.
4. You will then be prompted for Salesforce.com credentials.

Project located remotely (for example, on GitHub)

1. Clone project to your local filesystem
   $ git clone https://github.com/username/reponame.git
2. Drag directory into Sublime Text
3. Right click the project root in the Sublime Text sidebar
4. Select MavensMate > Create MavensMate Project.
5. You will then be prompted for Salesforce.com credentials.