Add support for -boot flag, which allows in-tree execution of Ur/Web The boot flag rewrites most hardcoded paths to point to the build directory, and also forces static compilation. This is convenient for developing Ur/Web, or if you cannot 'sudo make install' Ur/Web. The following changes were made: * Header files were moved to include/urweb instead of include; this lets FFI users point their C_INCLUDE_PATH at this directory at write <urweb/urweb.h>. For internal Ur/Web executables, we simply pass -I$PATH/include/urweb as normal. * Differentiate between LIB and SRCLIB; SRCLIB is Ur and JavaScript source files, while LIB is compiled products from libtool. For in-tree compilation these live in different places. * No longer reference Config for paths; instead use Settings; these settings can be changed dynamically by Compiler.enableBoot () (TODO: add a disableBoot function.) * config.h is now generated directly in include/urweb/config.h, for consistency's sake (especially since it gets installed along with the rest of the headers!) * All of the autotools build products got updated. * The linkStatic field in protocols now only contains the name of the build product, and not the absolute path. Future users have to be careful not to reference the Settings files to early, lest they get an old version (this was the source of two bugs during development of this patch.)

signature A = sig end
structure A = struct end
structure Ao : A = A


structure B = struct
        type t = int
end
structure Bo0 : sig end = B
structure BoA : A = B

signature B1 = sig
        type t
end
structure Bo1 : B1 = B
(*structure AoB1 : B1 = A*)

signature B2 = sig
        type t = int
end
structure Bo2 : B2 = B


structure C = struct
        type t = float
end
structure CoB1 : B1 = C
(*structure CoB2 : B2 = C*)


signature NAT = sig
        type t
        val zero : t
end
structure Nat : NAT = struct
        type t = int
        val zero = 0
end
(*structure NotNat : NAT = struct
        type t = int
        val zero = 0.0
end*)
(*structure NotNat : NAT = struct
        val zero = 0
end*)


signature WOBBLE = sig
        type t
        type s
end
structure Wobble1 = struct
        type t = int
        type s = float
end
structure Wobble2 = struct
        type s = int
        type t = float
end


structure N = struct
        type t = string
        structure N2 = struct
                type t = int
                val zero = 0
        end
        val x = "Hi"
end
signature N = sig
        structure N2 : NAT
        type t
        val x : t
end
structure No : N = N