Allow spaces in file names during testing.

Without spaces:

    > roots@1.2.4 test /Users/Hoverbear/roots
    > mocha



      command
        compile
          ✓ should compile files to /public 
          ✓ should minify all css and javascript 
          ✓ should compile all files to public 
        new
          ✓ should use the default template if no flags present (907ms)
          ✓ should use express template if the --express flag is present (915ms)
          ✓ should use basic template if the --basic flag is present (900ms)
        plugin
          ✓ should create a template inside /plugins on 'generate' (896ms)
          ✓ should use the javascript template if called with --js (894ms)
        version
          ✓ should output the correct version number for roots (892ms)
        js
          ✓ should expose bower's interface (898ms)

      compiler
        ✓ eventemitter should be hooked up properly 

      jade
        ✓ should compile jade view templates (924ms)

      ejs
        ✓ should compile ejs (913ms)

      coffeescript
        ✓ should compile coffeescript and requires should work (919ms)
        ✓ should compile without closures when specified in app.coffee (908ms)

      stylus
        ✓ should compile stylus with roots css 
        ✓ should include the project directory for requires 

      static files
        ✓ copies static files 

      errors
        ✓ notifies you if theres an error (936ms)

      dynamic content
        ✓ compiles dynamic files 

      deploy
        ✓ handles adapters correctly 
        ✓ has all the required shell methods 


      22 tests complete (17 seconds)
      
With spaces:

    > roots@1.2.4 test /Users/Hoverbear/Git Repos/roots
    > mocha



      command
        compile
          1) "before all" hook

      ✖ 1 of 22 tests failed:

      1) command compile "before all" hook:
         Error: Command failed: /bin/sh: line 0: cd: /Users/Hoverbear/Git: No such file or directory
    /bin/sh: ../../../bin/roots: No such file or directory

          at ChildProcess.exithandler (child_process.js:632:15)
          at ChildProcess.EventEmitter.emit (events.js:98:17)
          at maybeClose (child_process.js:730:16)
          at Socket.<anonymous> (child_process.js:943:11)
          at Socket.EventEmitter.emit (events.js:95:17)
          at Pipe.close (net.js:451:12)


    npm ERR! Test failed.  See above for more details.
    npm ERR! not ok code 0
    
It appears that the test file will trip up as it executes `child_process.exec()` commands since the file paths are not escaped properly. Solving the problem involved wrapping `#{basic_root}` and `#{root}` in `\"`'s.