Fixes for compiling on Debian Jessie.
Fixed redefinition warning for inline.
Merge remote-tracking branch 'upstream/master' into jessie

Conflicts:
	qemu/build.sh
Removed linux-user variants from build script.
They are currently broken.
Merge remote-tracking branch 'upstream/master' into jessie

Conflicts:
	docs/compile.txt
Merge branch 'jessie'
Instructions in markdown. Compiler from environment var.