layout: create .gitignore out of svnignore

Signed-off-by: Alon Bar-Lev <alon.barlev@gmail.com>
build: remove embedded wiki docs

old wiki site is unavailable.

having the need for online access for build from source repository was
never good.

Signed-off-by: Alon Bar-Lev <alon.barlev@gmail.com>