[v3] merge doc work to gcc-4_5-branch

[Benjamin Kosnik]

Sync trunk and gcc-4_5-branch in terms of doxygen layout, and makefile
commands. Should be mostly the same now, modulo work going on in trunk.

It is my hope that gcc.gnu.org or any other remote alternative can now
be configured to output (via "make doc-html") the documentation
necessary for the libstdc++ part of gcc-4.5.0, gcc-4.5.1, gcc-4.5.x.

tested x86/linux

-benjamin
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 20100826-2.patch
Type: text/x-patch
Size: 1039 bytes
Desc: not available
URL: <http://gcc.gnu.org/pipermail/libstdc++/attachments/20100827/c9ace75c/attachment.bin>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 20100827-1-gcc45.patch
Type: text/x-patch
Size: 59858 bytes
Desc: not available
URL: <http://gcc.gnu.org/pipermail/libstdc++/attachments/20100827/c9ace75c/attachment-0001.bin>