Fixed `sys.path`
Fixed VERSION regeneration
Fixed WS
Fixed installcheck target
Fixed when DESTDIR is empty it install python lib to the current path
Moved cyg-apt python lib from pythondir to libdir/PACKAGE
Fixed backslash escaping in sed expression
Fixed quoting strategy by simple quote only file path
Fixed cyg-apt program path on appveyor
Fixed the behaviour when the postinstall script fail
Added the initial implementation of `make dist`
Added the first implementation for `make distcheck`
Fixed CI's configuration to follow lastest Makefile changes
Fixed backslash replacement by using `tr`
Fixed VERSION
Added a version file to the release tarball
Added missing bzip2ext
Fixed execution directory for the version gen
Removed pythondir
Added dist and distclean to distcheck