Stream BioDepVis from a remote machine / Palmetto

[bentsherman]

I have updated the README instructions for rendering BioDepVis remotely using TurboVNC and VirtualGL. Currently, I can stream BioDepVis from a remote machine in the FCT lab, but it is very slow, and when I try to stream from Palmetto I get the following messages:

[VGL] WARNING: The OpenGL rendering context obtained on X display
[VGL]    :0 is indirect, which may cause performance to suffer.
[VGL]    If :0 is a local X display, then the framebuffer device
[VGL]    permissions may be set incorrectly.
[VGL] WARNING: The OpenGL rendering context obtained on X display
[VGL]    :0 is indirect, which may cause performance to suffer.
[VGL]    If :0 is a local X display, then the framebuffer device
[VGL]    permissions may be set incorrectly.
[VGL] ERROR: in readPixels--
[VGL]    398: GL_ARB_pixel_buffer_object extension not available
X Error of failed request:  GLXBadDrawable
  Major opcode of failed request:  150 (GLX)
  Minor opcode of failed request:  5 (X_GLXMakeCurrent)
  Serial number of failed request:  291
  Current serial number in output stream:  291

I'm not very familiar with OpenGL or VirtualGL so for now I leave this error log until we can debug it.

[bentsherman]

BioDepVis can now be run from Palmetto, now that some additional libraries were installed. Pending the addition of the Qt/5.9.2 module (momentarily), anyone will be able to build and run BioDepVis on Palmetto through a VNC server/client.