hoo boy, this is going to be a long changelog...

- gitignore more things
- make top-level makefile recurse into subdirectories
- have top-level configure script move itself aside after it runs
- wrap text more tightly in various files
- do stuff to try to fix src/Makefile (still not sure whether it
ultimately ends up getting generated by automake or autogen...)
- move deprecated "cygnus" Automake option to a separate unused
variable in various Makefile.am files
- make a bunch of changes to configure scripts (mostly silencing
autoscan/autoreconf warnings and stuff)
- I temporarily broke src/bfd, but managed to fix it again before
committing...
- lower -mmacosx-version-min from 10.7 to 10.6 wherever found because
I'm still on Snow Leopard
- excessively "#ifdef" the includes of files that were giving me
compilation problems
- be more apostrophe-phobic
- chmod certain scripts to be executable
- get gdbserver to at least compile for i386/x86_64 darwin, via
gratuitous copying and pasting from the Linux versions of the relevant
i386 files
- try to get the Xcode project to work, but that's hopeless...
- some subdirectories that did not used to use autoheader now do, as
such some files might be missing an include for "config.h"
- Add a list of older tarballs that were the last versions to contain
certain files and directories
- Add said files from older tarballs
- Add a readme about the darwinbuild plist (still seeing some errors
with it)
- copy in some files from gnulib and other GNU sources