article.mst: add charset to all javascript includes
article.mst: add charset to all javascript includes

Because webkit goes rouge and assumes either latin1 or utf-16
for the web page, we need to specify utf-8 for all our javascript
files.
[endlessm/eos-sdk#3026]

endlessm/eos-knowledge-lib,endlessm/eos-knowledge-lib,endlessm/eos-knowledge-lib,endlessm/eos-knowledge-lib