Implement unimplemented opcodes

[darkf]

When walking around various maps and interacting with objects, one usually comes across unimplemented scripting opcodes.
This issue will serve as a master list of known missing/unimplemented opcodes and their status.

• unimplemented opcode 814e (pc=26ee) in ncdrgdlr (newr1, talk to the guard in the northwest corner) e799ca2

• unimplemented opcode 80da (pc=cd6) in qcturret (encfite) 3910f53

• unimplemented opcode 8151 (pc=ea8) in fcfempnk/fcmalpnk (sftanker) be035ad

• unimplemented opcode 8109 (pc=2dba) in dcorphan (denbus1)

• unimplemented opcode 80e5 (pc=b00) in dnslvrun (dnslvrun) f4db78a

• unimplemented opcode 8152 (pc=18fc) in dcrunslv 8260f89