Refactor a LOT of code to take advantage of MMM functions

[phylll]

Once https://github.com/michael-buschbeck/mychs-macro-magic/issues/160 is available...

[phylll]

Partial remaining todo list:

• expand m3mgd[Health|Endurance]Boost() to process losses, as well, and use for defense scripts
• make remaining defense scripts use the new functions
• better validation of attack data pulled from exchange
• reintegrate waterWalkerXXX scripts (and magic blast attacks more generally) into rangedAttack; create better link with defense and the weapon/spell-specific effects script
• new experience accrual function for use in defense scripts & elsewhere

[phylll]

Closed via https://github.com/michael-buschbeck/mychs-macro-magic/pull/163