Add .gitignore.
Add quick start instructions.
Elaborate ffi module interface, make FFI func prepare be method of lib object.

Now there's lib.func(rettype, name, [argtype]), i.e. explicit ffi.sym() call is
not needed.
Implement support for variables. var = lib.var(type, name); var.get()
Cleanup.
ffi: Update tests for latest API.
Add test for accessing variables (errno).
Rename API sqrat_import() to sq_import().
sqimport: Keep reference to module name object while we use it.
Pulled error printing changes from squirrel-lang.
sqimport: Module loading debugging support.
Automatically import module "stdlibinit" on startup.

This module is supposed to import other import stdlib functionality, like
high-level import. If import fails, issue warning.
Move interpreter files to a separate dir after all.
Add minimal stdlibinit.nut module (bootstraps high-level import support).
Add install target for modules' Makefiles.

Installs in ~/.squirrel/lib/.
Install binaries too (to ~/bin). This includes rlwrap wrapper script.
Add top-level Makefile.

Run "make" to build everything, the "make install" to install everything
under your home dir.