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.)

con c1 = int
con c2 = (fn t :: Type => t) int

con id = fn t :: Type => t
con c3 = id int

con fst = fn t1 :: Type => fn t2 :: Type => t1
con c4 = fst int string

con snd = fn t1 :: Type => fn t2 :: Type => t2
con c5 = snd int string

con apply = fn f :: Type -> Type => fn t :: Type => f t
con c6 = apply id int
con c7 = apply (fst int) string

val tickle = fn n :: Name => fn t :: Type => fn fs :: {Type} =>
        fn x : $([n = t] ++ fs) => x
val tickleA = tickle[#A][int][[B = string]]
val test_tickleA = tickleA {A = 6, B = "13"}

val grab = fn n :: Name => fn t ::: Type => fn fs ::: {Type} =>
        fn x : $([n = t] ++ fs) => x.n
val test_grab1 = grab[#A] {A = 6, B = "13"}
val test_grab2 = grab[#B] {A = 6, B = "13"}

val main = {A = test_grab1, B = test_grab2}