Add unicode stuff for Python 2
Add unicode stuff for Python 2

Powerline will probably only be Python 2 in the foreseeable future
because of poor Python 3 support in applications like vim, so this
small change ensures correct unicode behavior in Python 2.

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