Use python’s try/catch, not vim’s
Use python’s try/catch, not vim’s

Fixes #344
Luffin/powerline,firebitsbr/powerline,xfumihiro/powerline,junix/powerline,russellb/powerline,bartvm/powerline,EricSB/powerline,firebitsbr/powerline,prvnkumar/powerline,Liangjianghao/powerline,S0lll0s/powerline,cyrixhero/powerline,lukw00/powerline,IvanAli/powerline,QuLogic/powerline,areteix/powerline,EricSB/powerline,bartvm/powerline,wfscheper/powerline,darac/powerline,cyrixhero/powerline,Liangjianghao/powerline,xfumihiro/powerline,seanfisk/powerline,dragon788/powerline,darac/powerline,xxxhycl2010/powerline,magus424/powerline,kenrachynski/powerline,cyrixhero/powerline,prvnkumar/powerline,QuLogic/powerline,Luffin/powerline,DoctorJellyface/powerline,seanfisk/powerline,blindFS/powerline,junix/powerline,lukw00/powerline,bezhermoso/powerline,wfscheper/powerline,s0undt3ch/powerline,keelerm84/powerline,DoctorJellyface/powerline,Luffin/powerline,dragon788/powerline,blindFS/powerline,bartvm/powerline,bezhermoso/powerline,wfscheper/powerline,areteix/powerline,IvanAli/powerline,Liangjianghao/powerline,EricSB/powerline,DoctorJellyface/powerline,russellb/powerline,kenrachynski/powerline,kenrachynski/powerline,magus424/powerline,S0lll0s/powerline,bezhermoso/powerline,xxxhycl2010/powerline,areteix/powerline,S0lll0s/powerline,s0undt3ch/powerline,xfumihiro/powerline,dragon788/powerline,seanfisk/powerline,russellb/powerline,IvanAli/powerline,s0undt3ch/powerline,junix/powerline,prvnkumar/powerline,xxxhycl2010/powerline,magus424/powerline,QuLogic/powerline,firebitsbr/powerline,blindFS/powerline,darac/powerline,lukw00/powerline,keelerm84/powerline