housekeeping, adding CI, moving some source files, fix linter

.luacheckrc

@@ -0,0 +1,31 @@
+--std             = "ngx_lua+busted"
+unused_args     = false
+redefined       = false
+max_line_length = false
+
+
+globals = {
+    --"_KONG",
+    --"kong",
+    --"ngx.IS_CLI",
+}
+
+
+not_globals = {
+    "string.len",
+    "table.getn",
+}
+
+
+ignore = {
+    --"6.", -- ignore whitespace warnings
+}
+
+
+exclude_files = {
+    "here/**",
+    "samples/**",
+    --"spec/fixtures/invalid-module.lua",
+    --"spec-old-api/fixtures/invalid-module.lua",
+}
+