Makefile: add target awareness to install markers and build rules (with fallback to default rule)
add mingw-w64 runtime (32 & 64 bit targets)
various packages: fix or disable mingw-w64 builds
Makefile: build targets serially to gracefully handle parallel and settings options
Merge branch 'master' into multi-rebase
Merge branch 'master' into multi-rebase
package wxwidgets: enable x86_64-w64-mingw32 build
Merge branch 'master' into multi-rebase
Merge branch 'master' into multi-rebase
Merge branch 'master' into multi-rebase
Merge branch 'master' into multi-rebase
Merge branch 'master' into multi-rebase
Merge branch 'master' into multi-rebase
Merge branch 'master' into multi-rebase
Merge branch 'master' into multi-rebase
Merge https://github.com/tonytheodore/mxe into tonytheodore
fix x86_64 build
merge with tony's multi-target branch - fix x86_64 build of wxwidgets
fix checksum of pthreads-w32
add biosig4c++/libbiosig/biosig-tools