Initial incomplete implementation of crawler in Go
More work on the concurrent feed updater

Added the entire html template library to use the state-based stripTags
function
staged_articles/published is now nullable
Added article and feed staging
Fixed multibyte bug with DB connections
Added connection timezone initialization
Switched to prepared statements for staging
Completed staging, unstaging and cleanup (TODO: syndication)
Added date/time localization, en-us localization for the date/time
Added "next update" computation
Slightly sharper "link" icon
Added additional localization documentation
Added a logo (reader only)
Added a favicon (ico and png)
Moved queries to a separate .go file
Updated schema_full.sql
Menus now built at runtime in reader.js
Menu translations moved to client-side
Minor CSS change
Addressed App Engine compatibility issues
Updated screenshot; removed video link (too old)
Screenshot update
Signficant speed-up of article paging queries (down to ~13ms from
~465ms)
Merge remote-tracking branch 'upstream/master' into upstreammerge