Add parameter for home dir shortening
Add parameter for home dir shortening

Closes #115.

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