fix windows test run
unit test round 2
attempting to fix ccache use on darwin
made ccache optional, no longer pulls clang on darwin build
fixing darwin build from Dockerfile
fixed missing nproc on OSX
updated readme to include regtest example, build examples
fix QT unit tests
made -j get passed down, added build.sh
This contains significant rebase / merge / testing work by Naut
<lbrynaut@protonmail.com>, Anthony Fieroni <bvbfan@abv.bg> and Brannon
King <countprimes@gmail.com>.
The patch Bitcoin Core has been maintaining for mac_alias was pulled by the mac_alias maintainer in commit 4f31cb084c1c6a8626128b0b00842020b6db9037. Delete the patch and remove the patch from the depends system.
Note that this PR won't be complete until a new version of mac_alias containing the path has been released, and the depends system is updated to reflect the new version.
