Update UseLATEX.cmake to latest version.

Removes warning with CMake 3.0.
Set ParaView version number to 4.2.
Update changes to organization of display and view properties.

These are now all consolidated into the properties panel.
Changes to view controls to plots.
Update changes effecting saving screenshots.

Also document export scene.
Move time controls back into time section where they belong.
Updated selections.
Minor change to animation.
Rendering large models.
Update icons to ParaView 4.2.
Icon for zoon to data changed.
Update scripting for ParaView 4.2.
Updated further reading.