Make nuvolajsdoc unicode-friendly
Make nuvolajsdoc unicode-friendly

 - use unicode literals
 - use codecs.open with utf-8 encoding instead of plain open

Signed-off-by: Jiří Janoušek <2a48236b6dcae98c8c0e90f4673742773ee17d91@gmail.com>

tiliado/nuvolaruntime,tiliado/nuvolaruntime,tiliado/nuvolaruntime,tiliado/nuvolaruntime