Change security protocol from SSL v3 to TLS v1.2
https://twitter.com/twittersecurity/status/522190947782643712
Merge pull request #142 from fin-alice/tls

Change security protocol from SSL v3 to TLS v1.2
Increment revision.

Fix behavior of user-streams backoff.
Fix: TLS 1.2 is not supported on Windows Vista.
Change notification of automatic updates.

Check updates on startup.
Fix: jumping scroll to top when pixel-base setting is disabled (#139).
Assembly information is not correct.
Maintain thresholds for image caching.
Improve design-time support.
Remove compilation warnings.
Increment revision.
Add runtime information to exception log.
Change converter name.
Improve timeline efficiency.
Reducing footprints of timeline items.
Improve timeline behavior in single-line display mode.