Tweaking the scripting overview documentation
Tweaking the scripting overview documentation

Use sections to make the page more readable. Minor grammar fixes.

Change-Id: Ibc5864468f1b1ab09adb352bf12520125f049ba5
Reviewed-by: Jędrzej Nowacki <2a36f1173c454f1cee5cc6ee35c017a292b3c0df@digia.com>
Reviewed-by: Hanne Linaae <bd5189785c8b1c8f602ca33fe5e0e372f8e62843@digia.com>
Reviewed-by: Lars Knoll <a812617a4072dcbeb80684eca0f369f0083af109@digia.com>

kobolabs/qtdoc,kobolabs/qtdoc,kobolabs/qtdoc,kobolabs/qtdoc