* First experiment with $nvidiabar
Added nvidiabar, nvidiagraph and nvidiagauge. Using a dummy value of 50% for now until it is integrated with the nvidia value query functions.
* Implement get_nvidia_barval()
`get_nvidia_barval()` no longer returns a dummy "50%" but instead an actual value for supported arguments:
`gpuutil`, `memutil`, `membwutil`, `videoutil`,`pcieutil`, `fanlevel` and `gputemp`
Additionally, add a nvidia_display variable. This enables the $nvidia variable to be used without
out_to_x yes (X11 support still has to be built in, you just don't have to use it).
* check only the unique part of the argument
* print temperatures like all others (%.1f)
* do argument parsing in nvidia.c (so all specific stuff is at one place)
* little header cleanup
git-svn-id: https://conky.svn.sourceforge.net/svnroot/conky/trunk/conky1@1231 7f574dfc-610e-0410-a909-a81674777703
