samaxesJS JavaScript library updates

Both the TOC (Table of Contents) components from samaxesJS JavaScript library have been updated.

Changes include:

• Reduced file size by removing duplicated code using a for loop when defining and processing indexes (1.8KB for the minified jQuery TOC plugin).
• Added a new option: context, allowing the TOC to list headings from only a portion of the page.

Please report any bug you may find in the project Issue Tracking.