Added release docs.

Author: harvzor

data/news/20200915.json

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+{
+    "date": "Tue, 15 Sep 2020 00:00:00 GMT",
+    "bodyText": "news/20200915.md",
+    "version": "1.7.0"
+}

data/news/20200915.md

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+### New
+
+- Added a "About" page to the start pages on the "/preview" page which provides some details about start pages that support it
+
+### Improved
+
+- Removed Google Analytics!
+- Changed title in the tab from having || to just |
+- Improved docs regarding how to set the startpage as your browser page
+- Made start page links always target the main window, even if it's embedded in an iframe