Convert file name to UTF-8 in vim file name segment
Convert file name to UTF-8 in vim file name segment

Closes #87.

firebitsbr/powerline,IvanAli/powerline,areteix/powerline,Liangjianghao/powerline,firebitsbr/powerline,xxxhycl2010/powerline,cyrixhero/powerline,magus424/powerline,keelerm84/powerline,kenrachynski/powerline,s0undt3ch/powerline,dragon788/powerline,seanfisk/powerline,IvanAli/powerline,DoctorJellyface/powerline,keelerm84/powerline,Luffin/powerline,Liangjianghao/powerline,DoctorJellyface/powerline,QuLogic/powerline,areteix/powerline,wfscheper/powerline,junix/powerline,Liangjianghao/powerline,prvnkumar/powerline,DoctorJellyface/powerline,xxxhycl2010/powerline,russellb/powerline,seanfisk/powerline,darac/powerline,s0undt3ch/powerline,EricSB/powerline,S0lll0s/powerline,bartvm/powerline,Luffin/powerline,IvanAli/powerline,lukw00/powerline,cyrixhero/powerline,dragon788/powerline,QuLogic/powerline,prvnkumar/powerline,lukw00/powerline,firebitsbr/powerline,EricSB/powerline,S0lll0s/powerline,prvnkumar/powerline,Luffin/powerline,QuLogic/powerline,dragon788/powerline,kenrachynski/powerline,magus424/powerline,lukw00/powerline,S0lll0s/powerline,bezhermoso/powerline,junix/powerline,russellb/powerline,xfumihiro/powerline,magus424/powerline,darac/powerline,bartvm/powerline,russellb/powerline,bezhermoso/powerline,xfumihiro/powerline,cyrixhero/powerline,xfumihiro/powerline,s0undt3ch/powerline,blindFS/powerline,bartvm/powerline,blindFS/powerline,kenrachynski/powerline,wfscheper/powerline,EricSB/powerline,wfscheper/powerline,bezhermoso/powerline,seanfisk/powerline,xxxhycl2010/powerline,blindFS/powerline,areteix/powerline,darac/powerline,junix/powerline