Merge pull request #3560
fe14e8d build: Change package name to Bitcoin Core (Wladimir J. van der Laan)
6c980c7 build: Package docs/ and don't package source. (Wladimir J. van der Laan)
39db27c build: Add bitcoin-cli.exe to installer (Wladimir J. van der Laan)
2f87b38 Adapt Windows installer for 64 bit (Wladimir J. van der Laan)
f622232 gitian: Windows 64 bit support (Wladimir J. van der Laan)