Updated the safari developer version.
Updated Polish translators

Added "Piter432" (me, hehe :P) as a new Polish translator of YouTube Center.
Merge pull request #416 from Piter432/patch-1

Updated Polish translators
Removed some corpses and removed every mention of the experimental topbar as it's not experimental anymore.
Re-implemented the static header and the scroll to player (for the static header).
Merge branch 'master' of https://github.com/YePpHa/YouTubeCenter
close #417
Created a standardized way to communicate to safer levels of YouTube Center. Safari is now injected into the page and will use the standardized way to request settings and xhr. Chrome has also been set to use the standardized messaging API.
Fixed a bug where the small player would be centered relative to the page width.
The issue with the small player has been resolved.
Fixed the flex width on channels being too wide.
Fixed issue 301.
Updated the ReadMe.
Moved YouTube Center to the page sandbox and set it to use the same method as Safari. Fixed an issue with the Chrome extension where it couldn't check for the latest version.
Fixed a bug with the Safari extension, which caused cross origin xhr to not work.
Re-added ClipConverter.cc to the mp3 services.
Fix for the annotations' position and size for the HTML5 player when resizing the player.
Merge branch 'master' of https://github.com/YePpHa/YouTubeCenter
Fixed an issue with the HTML5 player where the prevent auto-play didn't work.
Build a new developer version with the last fix.