New implementation for file I/O stack (thanks to Qing Lee)

In this implementation, all of the allocation is done in l3file without
having a separate layer in l3alloc. This makes the entire process much
clearer, and should work in exactly the same way (no interface changes).


git-svn-id: http://www.latex-project.org/svnroot/experimental/trunk@4436 de43f980-851b-0410-b2f7-c40aca1f87e0
A slight alignment fix in a Makefile

So everything lines up :-)


git-svn-id: http://www.latex-project.org/svnroot/experimental/trunk@4437 de43f980-851b-0410-b2f7-c40aca1f87e0