show more stats under the death message than just the points

[Riot]

• spheres unlocked
• enemies cleared
• weapons collected
• any other positive achievements from that specific run

Separate all-time stats from this-run stats, keep track of each (use a generic stats struct)

Same for the victory message, except perhaps show all stats

[Riot]

showing more statistics under the death and victory displays, resolves #238

→ <<cset 07f39ba780e7>>

[Riot]

adding initial death message framework, re #238

→ <<cset 54e1bab5f3c2>>

[Riot]

Removing milestone: Beta (automated comment)