Update README.md

move BUGS to a separate file

README.md

@@ -3,22 +3,14 @@
 [<img alt="Get it on Google Play" src="https://jberkel.github.io/sms-backup-plus/assets/img/google-play-badge.png" height="80pt"/>][Google Play Store] [<img alt="Get it on F-Droid" src="https://jberkel.github.io/sms-backup-plus/assets/img/f-droid-badge.svg" height="80pt"/>][F-Droid]
 
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+## Reporting bugs
 
-# NOTE:
-**Due to a recent change in Google's application permissions regarding XOAUTH, this app may not work as intended.**
-The issue is being discussed heavily in the [issue tracker](https://github.com/jberkel/sms-backup-plus/issues/959).
- * For a workaround, please refer to the instructions referenced in the
-   [issue tracker](https://github.com/jberkel/sms-backup-plus/issues/959#issuecomment-513018820)
-   or this [Android Police article][].
- * If you wish to backup to a non-Gmail address, follow the instructions referenced
-   [here](https://github.com/jberkel/sms-backup-plus/issues/959#issuecomment-507385460)
-
-Please understand that the issues linked are intended to provide information.
-As such, please keep comments focused on resolving the issue, as well as following the [GitHub Community Guidelines][].
+Please read the [known issues](BUGS.md) before reporting any new issues; we already know about several significant issues, including Gmail login failures (for which there is a robust work-around), and problems with logging phone calls into calendars (which we are investigating).
 
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+## Description
 
-This is a fork of the now defunct Android backup tool
+This is a fork of the now-defunct Android backup tool
 [SMS Backup](http://code.google.com/p/android-sms). It uses Gmail/IMAP to perform SMS, MMS and call log backups over
 the network.