Make palera1n.sh not directory dependant (#308)

* Make $dir not working directory dependent

* Change all occurrences of $(pwd) and change git

$(pwd) -> $(dirname "$0")
git -> git -C $(dirname "$0")

* Update palera1n.sh

palera1n.sh

@@ -1,5 +1,7 @@
 #!/usr/bin/env bash
 
+pushd $(dirname "$0")
+
 mkdir -p logs
 set -e 
 
@@ -1011,3 +1013,5 @@ echo "If you have any issues, please join the Discord server and ask for help: h
 echo "Enjoy!"
 
 } 2>&1 | tee logs/${log}
+
+popd