Tweaked wording for introduction-to-custom-events.md
Improve article attribution heuristic. Fixes #380.

Make the attribution algorithm trace through the history
across file rename operations, but do not consider such operations as an
indication of contribution.
0.3.0
Event Delegation: Rewrite to fix typos and grammer, make things clearer, and clean up some oddly worded phrasing
Testing Types: Added few more types.
Intro to Effects: Fix generation of buttons.
Typo in jquery-object.md
Removed the Metadata plugin section from Advanced Plugin Concepts (this addresses the first half of #409)
Removed unnecessary semicolons
Adding article on jQuery widget method invocation.
New article on extending widgets with the widget factory.

Minor clarifications.
Clarify that many of the widget methods return undefined through instance invocation.
Fixes #395, update index article with indended and 1.9+ behavior.
Add comments explaining switch block
Update advanced-plugin-concepts.md

Code style adherence
Merge branch 'pr/432'
0.3.1
0.3.2
Add event-basics and event-helpers to order.yml. Fixes #437.
Removing a bracket

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