Screenshot looks awesome!

I get this error on mac os Yosemite, I made a github issue here: https://github.com/shockone/black-screen/issues/21

    black-screen$ gulp
    [17:35:09] Using gulpfile ~/black-screen/gulpfile.js
    [17:35:09] Starting 'default'...
    [17:35:09] Starting 'watch'...
    [17:35:09] Starting 'clean'...
    [17:35:09] Finished 'default' after 359 ms
    [17:35:09] Finished 'clean' after 58 ms
    [17:35:09] Starting 'typescript'...
    [17:35:09] Starting 'sass'...
    [17:35:10] Starting 'react'...
    [17:35:11] gulp-notify: [Black Screen Watcher] React has been compiled.
    [17:35:11] Finished 'react' after 1.83 s
    ~/black-screen/node_modules/typescript/lib/typescript.js:35171
                if (host.fileExists(fileName)) {
                         ^
    TypeError: undefined is not a function
        ...