Updated build.ps1 to use PWD
Updated build.ps1 to use PWD

JoeStead/Nancy,davidallyoung/Nancy,danbarua/Nancy,NancyFx/Nancy,davidallyoung/Nancy,JoeStead/Nancy,damianh/Nancy,khellang/Nancy,NancyFx/Nancy,xt0rted/Nancy,danbarua/Nancy,xt0rted/Nancy,davidallyoung/Nancy,khellang/Nancy,asbjornu/Nancy,damianh/Nancy,jeff-pang/Nancy,NancyFx/Nancy,blairconrad/Nancy,blairconrad/Nancy,jeff-pang/Nancy,xt0rted/Nancy,asbjornu/Nancy,danbarua/Nancy,khellang/Nancy,sadiqhirani/Nancy,JoeStead/Nancy,sadiqhirani/Nancy,asbjornu/Nancy,sadiqhirani/Nancy,davidallyoung/Nancy,blairconrad/Nancy,asbjornu/Nancy,jeff-pang/Nancy,davidallyoung/Nancy,JoeStead/Nancy,jeff-pang/Nancy,damianh/Nancy,asbjornu/Nancy,khellang/Nancy,sadiqhirani/Nancy,blairconrad/Nancy,xt0rted/Nancy,danbarua/Nancy,NancyFx/Nancy