Edits to event basics; using jQuery with other libs
edits from adam's feedback
Repulled master as per Adam
General cleanup and reordering of the events section

Event helpers page removed as per advice from Dave Methvin.
Delegate and undelegate removed thanks to the rewrite of the Event
Delegation page.
Cleaned up triggering event handlers page, removed deprecated code.
Added attribution for jQuery Fundamentals, closes #151
Merge branch 'master' of https://github.com/jquery/learn.jquery.com
Merged Using jQuery with Other Libs from Mediawiki
bring about-jquery section into core style
update examples to core styls in AJAX section
minor change to how callback args spaced in About section
Removed astericks from command line examples as they don't render within ticks.
Merge pull request #171 from RedWolves/contrib

Removed astericks from command line examples as they don't render within...
Merge pull request #168 from bobholt/coreStyle

bring about-jquery section examples into core style
remove delegate/undelegate page (out of date)
Merge pull request #175 from bobholt/removeDelegate

remove delegate/undelegate page (out of date)
Remove stray characters in code caption
Upgrade to grunt-jquery-content 0.5.9
Merge pull request #161 from RedWolves/issue-151

Added attribution for jQuery Fundamentals
Fix missing backticks and stray characters in caption in built-in-effects article. Closes #130
Add level metadata to event delegation article. Closes #162.