fix(notification): extract notification summary from $params

Fixes #6885
docs(contribute): Updated recommendations on which branch to submit against

Fixes #6964
fix(pages): Stop registering undefined upgrade event callback

Fixes #6780
Merge pull request #7061 from ewinslow/pages-upgrade-warning-b6780

fix(pages): Stop registering undefined upgrade event callback
Merge pull request #7060 from ewinslow/docs-branches-b6964

docs(contribute): Updated recommendations on which branch to submit against
chore(js): configure package.json for simpler JS testing
fix(js): elgg.normalize_url no longer modifies urls that begin with a recognized scheme

Fixes #6000
Merge pull request #7065 from ewinslow/normalize-url-b6000

fix(js): elgg.normalize_url no longer modifies urls that begin with a recognized scheme
docs(notifications): Adds docs for  'object', 'action' and 'summary' params used by notify_user()
Merge pull request #7066 from juho-jaakkola/notification-summary

Extract summary from $params in notify_user()
feature(notifications): site_notification about an annotation can now have an URL

Fixes #7055
feature(likes): improves compatibility with notification plugins

This allows for example site_notifications about new likes to include a link to the liked entity.

Refs #7055
Merge pull request #7064 from juho-jaakkola/site_notifications

Improves notifications about new annotations
docs(js): corrects function name to shim AMD modules

Fixes #7072
Merge pull request #7075 from PerJensen/docs_js_issue

docs(js): corrects function name to shim AMD modules
chore(travis): Stop downloading composer locally

Travis PHP 5.3+ environments come with composer pre-installed already
Merge pull request #7077 from ewinslow/travis-composer

chore(travis): Stop downloading composer locally
docs(all): fixes typos and improves readability
fix(views): respect icon_sizes config values when rendering icons

Remove hard-coded references to available icons sizes and use global icon_sizes config values and keys instead
Merge pull request #7088 from hypeJunction/icon-sizes

fix(views): respect icon_sizes config values when rendering icons