Move things around for gb

This moves all restic source files to src/, and all vendored
dependencies to vendor/src.

vendor/src/github.com/jessevdk/go-flags/examples/bash-completion

@@ -0,0 +1,9 @@
+_examples() {
+	args=("${COMP_WORDS[@]:1:$COMP_CWORD}")
+
+	local IFS=$'\n'
+	COMPREPLY=($(GO_FLAGS_COMPLETION=1 ${COMP_WORDS[0]} "${args[@]}"))
+	return 1
+}
+
+complete -F _examples examples