Latest strings from crowdin

Complete translation for Chinese Traditional
Merge pull request #285 from Gol-D-Ace/crowdin

Latest strings from crowdin
Output full range BT.709
Enable non-deterministic encoding
Output 48 kHz audio
Fixed a small visual bug
Latest strings from crowdin

Complete translation for Spanish
Updated the AUTHORS file with all the translators from crowdin
corrected flaws...

Why is this always happening to me....
Merge pull request #286 from Gol-D-Ace/crowdin

Latest strings from crowdin
Merge pull request #288 from Gol-D-Ace/AUTHORS

Updated the AUTHORS file with all the translators from crowdin
Fix DShowPlugin pixel shaders
update version to 0.553
update installer file to 0.553
added italian translation thanks to Angelo Romano
Updated traditional chinese translation
Merge remote-tracking branch 'remotes/upstream/master'
Latest strings from crowdin + AUTHORS file update

Complete translation for Portuguese
Latest strings from crowdin + AUTHORS file update
Separated encoding to a separate thread to prevent constant framerate issues, and increased frame timing precision to nanosecond approximation