Version 1.7.1 — auto default_page detection

- config.json now has default_page: auto for fresh installs
- CodePressCMS::detectDefaultPage() scans content/ for first available file
- getHomepageTitle() also respects auto mode
- Admin config form preserves auto as selectable option
- Save handler falls back to auto instead of index

config.json

@@ -2,8 +2,8 @@
     "site_title": "CodePress",
     "content_dir": "content",
     "templates_dir": "cms\/templates",
-    "default_page": "index",
     "active_theme": "default",
+    "default_page": "auto",
     "language": {
         "default": "nl",
         "available": [