Fang v0.2.10-beta.1

What's Changed

• Move singleinstancecheck to submodule by @MrEricSir in #199
• Treat warnings as errors by @MrEricSir in #201
• Support adding multiple feeds, when available by @MrEricSir in #202
• Speed up compilation a bit by @MrEricSir in #203
• Centralize error code paths by @MrEricSir in #204
• Show loading spinner when loading news items in web view by @MrEricSir in #207
• Add context menu to TextEntry by @MrEricSir in #209
• Determine port numbers at runtime by @MrEricSir in #210

Full Changelog: v0.2.9-beta.1...v0.2.10-beta.1