Public File Sharing (#72)

* Public File Sharing

This implements public file sharing (read-only) with and without passwords (#57).

It also fixes a problem with filenames including special characters like `#` not working properly (#71).

You can share a directory or a single file, by using the new share icon on the right of the directories/files, and click on it to manage an existing file share (setting a new password, or deleting the file share).

There is some other minor cleanup and other copy updates in the README.

Closes #57
Fixes #71

* Hide UI elements when sharing isn't allowed

lib/config.ts

@@ -21,6 +21,7 @@ export class AppConfig {
       },
       files: {
         rootPath: 'data-files',
+        allowPublicSharing: false,
       },
       core: {
         enabledApps: ['news', 'notes', 'photos', 'expenses'],
@@ -156,6 +157,12 @@ export class AppConfig {
     return this.config.auth.enableSingleSignOn;
   }
 
+  static async isPublicFileSharingAllowed(): Promise<boolean> {
+    await this.loadConfig();
+
+    return this.config.files.allowPublicSharing;
+  }
+
   static async getFilesRootPath(): Promise<string> {
     await this.loadConfig();