ImageItem now has auto downsampling; seems to be working properly.
Still need auto clipping as well.
Added cylinder geometry to opengl MeshData
No rendering of "Line style keyword arguments:"  list because of missing blank line and  mysterious unexpected identation error
In list tables "**Arguments**", "Arguments:"  changed to **Arguments:**
Bugfix: Malformed  tables.
Merge branch 'develop' of https://github.com/pyqtgraph/pyqtgraph into develop
Bugfix: Malformed  tables.
All argument lists with `**Arguments:**`
Signal cleanup:
- Renamed GraphicsView signals to avoid collision with ViewBox signals that
  are wrapped in PlotWidget: sigRangeChanged => sigDeviceRangeChanged and
  sigTransformChanged => sigDeviceTransformChanged.
- All signal disconnections that catch TypeError now also catch RuntimeError
  for pyside compatibility.
Merge remote-tracking branch 'remotes/upstream/develop' into develop
IDE files added to .gitignore
- Links in plot function added/resolved
   (PlotWidget.plot() can not resolved, maybe useless)

-Links in "Organization of Plotting Classes" added/resolved
   - GraphicsLayoutItem changed to GraphicsLayout
      (svg/png picture also)

  graphicswindow.rst now useless (no link)

  Yes it "makes" ....
  Renaming of GraphicsLayoutItem to GraphicsLayout
Added a few new examples
Added BarGraphItem.shape() to allow better mouse interaction
Added support for GL_LINES in GLLinePlotItem
GLViewWidget.itemsAt() now measures y from top of widget.
Merge branch 'cylinder_mesh' into develop
Adds MeshData.cylinder
Added Vector.angle method
Inverted MeshData.cylinder normals
Cylinder base moved to z=0
Added ViewBox.setBackgroundColor()