[SCAG] typos and fixes

[kgirtxd]

• Arcana Domain Cleric - Extra comma in spell list. [SCAG] Misc Fixes #83
• Way of the Long Death Monk - line 48: sheet display is missing second close curly bracket for {{ki:dc}} [SCAG] Misc Fixes #83
• background-inheritor.xml, line 45 "Gaming Set or Mustical Instrument" -> "Gaming Set or Musical Instrument" [SCAG] Misc Fixes #83
• Tiefling, Winged and Feral moved to traits rather than subrace/variant (may require revamp of PHB and possibly MTF tiefling files)

[Zenoverlordian]

monk-longdeath.xml, line 48: sheet display is missing second close curly bracket for {{ki:dc}}

[Vrontis]

background-inheritor.xml, line 45 "Gaming Set or Mustical Instrument" -> "Gaming Set or Musical Instrument"

[NickVendel]

Barbarian Path of the Battlerager:
<prerequisites>Dwarf</prerequisites> to <prerequisite>Dwarf</prerequisite> #319