more regular kmap[] and description

comment nits

Remove unused 'state' variable that broke the build in recent gcc's

Rev 6

Remove nice font from master

Fetch nice font from font branch, if possible

Move xv6 release tars/pdfs in to 6.828 repo

Remove web directory; all cruft or moved to 6.828 repo

Make web page refer to git releases

Remove old book chapters

Re-alphabetize OBJS

Note about the meaning of sheet1 in runoff.spec

sources -> sources and text

Shorten history of xv6
Cut section about commentary
Add (failing) link to xv6 source section pointing to the text.
Delete the incorrect/incomplete list of universities using jos/xv6

Setting indent-tabs-mode nil everywhere is dangerous

Sync up clean and gitignore better

Update gitignore

Fix stale comments in entryother.S

Make the ELF entry point a physical address

This way, the bootloader doesn't have to translate the entry point.
This also makes xv6 multiboot-compliant and follows the convention
used by Linux.

kernel depends on kernel.ld

Add QEMUEXTRA environment to add extra QEMU arguments, like in JOS

I can't do math; fix bug introduced in 5a9761

A few missed xv6.pdf dependencies

Update year in URL

Update index example in TOC footer