Fix scroll to issues with post-hover.js, clean up highlightReply

Conflicts:
	templates/post_reply.html
	templates/post_thread.html
update pl_PL translation
update fr_FR transation
import da_DK transation
update es_ES locale
import zh_TW translation
remove license exception for Tinyboard vanilla, since they moved to a different one
Merge 4.5
Conflicts:
	templates/post_thread.html
update locales for 5.0
tag for 4.5.1
Merge 4.5

Conflicts:
	install.php
Fix issue #45
Merge upstream/master