Added Brazilian Portuguese translation files.
Renamed Chinese translation folder.

Made it explicit that it's "Chinese Chinese", and not Taiwanese Chinese.
Tweaked translation handling.

Now POSIX codes are used throughout, it makes more sense and I should
have done this sooner. The masterlists will need updating to use the new
codes.
Added code support for Brazilian Portuguese.

Also fixed language selection broken in last commit, and updated archive
and install scripts.
Updated readmes.
Fixed issue #117.

Priority comparisons are now carried out for plugins that conflict,
unless a plugin is empty, in which case comparison takes place anyway.
Attempted to fix priority metadata handling.

Now if it is not implied to be zero, it should be saved and applied like
non-zero values.
Merge pull request #4 from loot/master

merge