add missing weapons

[k0l11]

closes #144 until more weapons are released

checking the list here:
implemented here:

• bloodtaintedgreatsword
• emeraldorb
• ferrousshadow
• halberd
• messenger
• oldmercspal
• otherworldlystory
• pocketgrimoire
• ravenbow
• twinnephrite
• whiteirongreatsword

already implemented:

• compoundbow
• darkironsword
• everlastingmoonglow
• filletblade
• hakushinring
• ironpoint
• katsuragikirinagamasa
• mitternachtswaltz
• polarstar
• predator
• recurvebow
• seasonedhuntersbow
• silversword
• slingshot
• swordofdescension
• travelershandysword
• whitetassel
• wineandsong
• calamityqueller

unreleased:

• amberbead (called ambercatalyst on wiki)
• ebonybow
• quartz
• theflagstaff

other stuff:

• fix blackcliff proccing if someone else killed the enemy
• fix blackcliff proccing if weapon holder is off-field
• fix blackcliff proccing if player died
• move lithicblade from sword to claymore folder
• split up huntersbow and seasonedhuntersbow into their own files
• adds more weapon aliases