initial commit - working code

new file:   .gitignore
	new file:   .idea/.gitignore
	new file:   .idea/Steamworks-Collection-Downloader.iml
	new file:   .idea/modules.xml
	new file:   .idea/vcs.xml
	new file:   downloader/downloadable.go
	new file:   downloader/downloader.go
	new file:   go.mod
	new file:   go.sum
	new file:   main.go
	new file:   manifest/entry.go
	new file:   manifest/manifest.go
	new file:   webapi/publishedFileDetailsResponse.go

manifest/entry.go

@@ -0,0 +1,19 @@
+package manifest
+
+type Entry struct {
+	ID                  string
+	TimeCreated         string
+	TimeUpdated         string
+	HContentFile        string
+	HContentFileSize    string
+	HContentPreview     string
+	HContentPreviewSize string
+}
+
+func (w Entry) FileNamePrefixed(prefix string) string {
+	return prefix + w.ID + ".vpk"
+}
+
+func (w Entry) PreviewFileNamePrefixed(prefix string) string {
+	return prefix + w.ID + ".jpg"
+}