Pad powerline segments with no-break spaces
Pad powerline segments with no-break spaces

Some applications using Pango and/or Cairo draw square unknown character
glyphs next to divider glyphs instead of regular spaces. Non-breaking
spaces resolves this issue, and they are probably more correct to use
(no application should break lines at the padding spaces since they
"glue" the segment and dividers together as one unit).

This commit appears to work fine in all supported applications on Linux.

This commit resolves the gvim font rendering problems mentioned in
issue #113.

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