* Added ln check for snap
Realised that if you manually created (or already had) a ln it would cause the build to fail. So added in a check to see if it exists.
Moved commands out of prime-override as it didnt really add anything and made it harder to read
* Version no. update to 0.29.1
The snap package was being built with 0.29.1 but is presenting as 0.27 still (locally and in ubuntu snap store)
Fernand Galiana
Emanuele Ciurleo
Aleksei Romanenko