Add static check tools

Added md check to check .md style
Add yamllint to check yaml style
Moved gometalinter to scripts folder

Signed-off-by: Madhu Rajanna <mrajanna@redhat.com>

scripts/lint-go.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+
+set -o pipefail
+
+if [[ -x "$(command -v gometalinter)" ]]; then
+  gometalinter -j "${GO_METALINTER_THREADS:-1}" \
+    --sort path --sort line --sort column --deadline=10m \
+    --enable=misspell --enable=staticcheck \
+    --vendor "${@-./...}"
+else
+  echo "WARNING: gometalinter not found, skipping lint tests" >&2
+fi