Section on Morphic layout

[LinqLover]

Possible contents (brainstorming):

• ProprtionalLayout and LayoutFrame
• TableLayout and specific layout selectors such as hResizing, cellGap, cellDirection, disableLayout, etc.
• GridLayout (only mention)
• some common patterns for arranging (e.g., how to build a tool like EventRecorderMorph or ScorePlayerMorph: rows via composition, spacers via transparent morphs, proper choice and use AlignmentMorph, BorderMorph, and ScrollPane)
• see also existing FAQ on TextMorph + hResizing