A language can now introduce a `configure-runtime' submodule that
is `dynamic-require'd before the enclosing module.
This new submodule protocol provides a more general and
easier-to-understand way of configuring the run-time environment for
a module's language, as compared to the `module->language-info'
path (through a `get-info' function, via a 'configure-runtime value,
and finally loading the specified module).
The `module->language-info' path remains in place, and it is
checked after a `configure-runtime' submodule is run, since
that order is likely to be the most backward compatible.
I started from tabs that are not on the beginning of lines, and in
several places I did further cleanings.
If you're worried about knowing who wrote some code, for example, if you
get to this commit in "git blame", then note that you can use the "-w"
flag in many git commands to ignore whitespaces. For example, to see
per-line authors, use "git blame -w <file>". Another example: to see
the (*much* smaller) non-whitespace changes in this (or any other)
commit, use "git log -p -w -1 <sha1>".
This addition triggered several other changes:
* -k for a Mac OS X embedding is now relative to the __PLTSCHEME
segment (which means that executables won't break if you strip
them, for example)
* the command-line no longer has a limited size for Mac OS X
launchers and embedding executables
* Mac OS X GUI and Windows launchers record the creation-time
collection path, unless they are created as "relative" launchers
