Use vim to provide /bin/vi
Support packages with digits as their first character
Add 9base package, which will install mk, awk and sed
Use sed and awk from 9base
Build busybox from source
No need to set CFLAGS/LDFLAGS explicitly

They are exported in the environment.
Use $nprocs for busybox and 9base
Make clean-world an alias for clean-all
Build kernel with our cross-compiler
Fix the sed magic in mkfile
Use git version of dvtm
Revert "Build kernel with our cross-compiler"

This reverts commit 7fc57a998aa441f62884a0593456b9d5c0eb00c5.
Add kernel config for i486
Fix mpg123 to compile with our i486 toolchain
Update README
kernel_headers depends on crossmusl
9base depends on kernel_headers
Update README
Add fetch-world to README
Update README