[cslStyle.js] Adjust file naming
[cslStyle.js] Adjust file naming

Change encoding from ISO-8859-1 to UTF-8.

Delete the content of the last (square) bracket, e.g. for non-english languages.

This solves #174.
citation-style-language/csl-editor,citation-style-editor/csl-editor,citation-style-editor/csl-editor,citation-style-language/csl-editor,citation-style-language/csl-editor,citation-style-editor/csl-editor