Update Toltec link & restore middle-button launch instructions

Installation-on-ReMarkable.md

@@ -1,6 +1,6 @@
 ## Installation via Toltec
 
-1. Install [Toltec](https://github.com/toltec-dev/toltec#install-it)
+1. Install [Toltec](https://toltec-dev.org/)
 2. Run: 
 ```
 opkg install koreader
@@ -14,7 +14,7 @@ opkg install koreader
 1. Download the [latest release](https://ota.koreader.rocks/) of KOReader
 2. Copy the file to your device:
 ```
-scp koreader-remarkable-*targz root@10.11.99.1:
+scp koreader-remarkable-* root@10.11.99.1:
 ```
 4. Log into your device:
 ```
@@ -22,7 +22,7 @@ ssh root@10.11.99.1
 ```
 5. Extract the contents of the file:
 ```
-tar -xf /home/root/koreader-remarkable-*targz
+tar -xf /home/root/koreader-remarkable-*
 ```
 6. Copy the systemd unit file to the system directory:
 ```
@@ -33,11 +33,16 @@ cp /home/root/koreader/koreader.service /etc/systemd/system/
 systemctl start koreader
 ```
 
+- To launch KOReader by holding down the middle button for 3 seconds (reMarkable 1):
+```
+cp /home/root/koreader/button-listen.service /etc/systemd/system/
+systemctl enable --now button-listen
+```
 - To launch KOReader at startup:
 ```
 systemctl disable --now xochitl && systemctl enable --now koreader
 ```
-- To override reMarkable's splashscreens for poweroff and reboot events:
+- To allow KOReader screensavers for poweroff and reboot events:
 ```
 systemctl disable remarkable-shutdown remarkable-reboot
 ```