moving a function and struct over to a common library, starting on lockfile for server

common/structures.go

@@ -0,0 +1,8 @@
+package common
+
+//FileTypes is for ignoring files to add or ignoring compress, or for locked files, all use the same type of struct (files, folders and exts)
+type FileTypes struct {
+	Files   []string `toml:"files"`
+	Exts    []string `toml:"exts"`
+	Folders []string `toml:"folders"`
+}