Audit bluemagic.lua params.

[mrhappyasthma]

Theres a Lua table called params passed to a few functions in bluemagic.lua, however a few of the parameters are unused.

We should either:

• Remove them
  • If so, they could always be added back later when properly implemented.
• Update the code to properly reference them
  • If so, audit all spells to make sure they set the proper values, now that it's used.

[mrhappyasthma]

params.tpmod and the TPMOD_* enum-like values are unused, but set in most tests.

[mrhappyasthma]

params.azuretp is unused, but set in most tests.

[mrhappyasthma]

params.dmgtype is used but undocumented and not used uniformly.

[mrhappyasthma]

params.tMultiplier is set in many tests (although not all). It's used in code but not documented in the comment on the method where it's used.

[mrhappyasthma]

params.offcratiomod is not documented, but is used in cannonball.lua.

[SirGouki]

The latter choice should be done instead of the former. They are likely in there in preparation for finishing the spells, so removing them doesn't make sense.

[ibm2431]

Related: #351