Psalter

Invalid date

---Updated UI---
- Coloured buttons
- Removed title bar
- Disabled screen rotation
- Screen does not dim/sleep (no longer need to keep scrolling)

---Added Psalms---
- Pressing the psalter / psalm button switches between the two
- If psalm is changed, pressing the button switches to the lowest psalter number for that psalm

---Others---
- Added stanza number for songs that were previously missing it