Suport for special chars and accents in themes' folders or files names

[shadow2560]

Hi,

This could be a problem to fix, as stated on the closed issue #84 because the problem seems to be always present in the last version of the homebrew.

[exelix11]

Afaik switch itself has problems with handling special characters, it's best to avoid them

[Migushthe2nd]

Ah I can partially fix this on Themezer's side by normalising theme names even further.