Notable changes

• Add Python 3 support! Granary now requires either Python 2.7+ or Python 3.3+.
• Instagram:
  • Fix scraping profile pages.
• Twitter:
  • Update character counting to handle Twitter change that now auto-links all ccTLDs. Background.
• GitHub:
  • Bug fix for get_activities() with deleted issues and repos.
• microformats2:
  • object_to_json(): convert tags to simple strings in the category property, not full nested objects like h-cards (#141).
  • Special case GitHub issues that are in-reply-to a repo or its /issues URL to be objectType issue.
  • Render simple string categories in HTML output.

This release is intentionally small and limited in scope to contain any impact of the Python 3 migration. It should be a noop for existing Python 2 users, and we've tested thoroughly, but I'm sure there are still bugs. Please file issues if you notice anything broken!