Missing quotes and new parameters
Missing quotes and new parameters

- added missing quotes to signProg 
- introduced the ability to pass own gitian.sig and bitcoingold-detached-sigs repo urls
shelvenzhou/BTCGPU,h4x3rotab/BTCGPU,shelvenzhou/BTCGPU,h4x3rotab/BTCGPU,BTCGPU/BTCGPU,BTCGPU/BTCGPU,shelvenzhou/BTCGPU,BTCGPU/BTCGPU,h4x3rotab/BTCGPU,shelvenzhou/BTCGPU,BTCGPU/BTCGPU,h4x3rotab/BTCGPU,shelvenzhou/BTCGPU,BTCGPU/BTCGPU,h4x3rotab/BTCGPU,shelvenzhou/BTCGPU,h4x3rotab/BTCGPU,BTCGPU/BTCGPU