Fixed errors related to Unicode characters

[stefa168]

Hi,
These days I had to use your wonderful pyLODE and I needed to fix a problem related to unicode characters, since my ontology uses both English and Italian (and accented characters).

It was a quick fix; it seems to solve the problem for me, and it should also solve any problem like those similar to issue #110 (I tested the attached ontology, to be sure).

I hope that this small contribution can be of any use to you.

[nicholascar]

Hi @stefa168, thank you very much for supplying this PR - I've merged it now and will put out a PyPI new package release shortly.

I think there's a fair bit of work needed for better multi-lingual support: the templates could better use multiple labels for classes and properties in different languages with a default and other languages indicator. Some handling of this is built in already but not enough for ontologies like DCAT2 that supply multiple language values for labels, descriptions and so on.