More descriptive titles for RSS feeds

[derekeder]

Let's make the titles for the RSS feeds more descriptive:

Search

Example: https://nyc.councilmatic.org/search/rss/?q=police
Change the title to "[city name] Councilmatic: Search for "[query string]"

Legislation

Example: https://nyc.councilmatic.org/legislation/res-85-2014/rss/
Change the title to "[city name] Councilmatic: [bill name]: Recent Actions"

Council Members

Example: https://nyc.councilmatic.org/person/margaret-s-chin/rss/
Change the title to "[city name] Councilmatic: Council Member [person name]: Recently Sponsored Bills"

Events

Can't find the link to events. See issue #175

Related to #158