X11/XQuartz should work right after installation

When I take any of the X11 app - Inkscape or Wireshark or x48, none of them will work right after installing XQuartz without some extra bits of work:

1. User would have to **relogin** to activate & start the XServer daemon
2. User would have to manually **choose the location of X11**

![screen-x11-dialog](https://cloud.githubusercontent.com/assets/287584/3279447/06a849f0-f3fc-11e3-884c-136367ea6f8e.png)

This will free user's hands completely, well almost completely. The only bit left is this:

![screen-wireshark](https://cloud.githubusercontent.com/assets/287584/3279452/34585854-f3fc-11e3-921e-b30bd9249462.png)

but I was not trying to find out how to build the font cache and I'm not even convinced we should be doing that on behalf of the user.

#### Feel free to test it on a fresh OSX:
```
brew cask install xquartz wireshark inkscape x48
```