remove text-case="sentence" from all styles.
CC @ms609 - this affects many of the styles you contributed. The reason for removing is that automated sentence casing doesn't work well, see here
http://citationstyles.org/downloads/specification.html#sentence-case-conversion
and for Zotero
http://www.zotero.org/support/kb/sentence_casing
(not sure if Papers, Mendeley et al have similar instructions, but they should)
Merge branch 'master' of github.com:citation-style-language/styles

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