Made edits to learning path
LRDOCS-1292 Fixed typo that prevented most of the Markdown from being rendered
LRDOCS-1292 Re-worked intro to AlloyUI learning path
LRDOCS-1292 Moved alloyui learning path to new location after the asset learning path
LRDOCS-1292 'Alloy UI' -> 'AlloyUI'
LRDOCS-1292 Merged previous learning path (assets) into this one (alloyui)
LRDOCS-1292 Removed silly phrase generator from edit_entry.jsp; more text refactoring in AUI validator section
LRDOCS-1460 Added generate sample messages button to edit_entry.jsp and styles.
LRDOCS-1292 SF, clarify names
LRDOCS-1292 SF Use <aui:script /> use attribute
LRDOCS-1292 SF
LRDOCS-1292 SF, renaming for clarification
Removed unused 'use' variable, removed the 'use' CSS id from the 'Use' buttons; a CSS id should only be applied to a single element
LRDOCS-1292 SF
LRDOCS-1292 Moved remaining characters message so it appears above the Message field; SF
LRDOCS-1292 Removed unused CSS
LRDOCS-1292 SF
LRDOCS-1292 Added AUI layout/columns, AUI button row for buttons, CSS class for messages, SF
LRDOCS-1292 Fixed Generate Sample Message Button so that repeated clicks don't add extra message/button pairs
LRDOCS-1292 Updated Guestbook portlet's Generate Sample Message button to display at most 3 messages. Added Hide Sample Messages button to clear them.