Adding social_media_url to podspec
[Issue #86] Storing intermediary date to avoid microsecond precision error

Signed-off-by: Mattt Thompson <m@mattt.me>
[Issue #91] Localization into Polish

Signed-off-by: Mattt Thompson <m@mattt.me>
Bumping version to 1.4.1
[Issue #88] Adding note about workaround for localization false positives
Add Czech localization