Changed behaviour of default attack when the only options are power and skill and there is fire assistance available: now, Power will always be selected
reggie rage, ZOEcon, Cowboy Bebop, others not yet in database
* add a regression test for attacks by morphing trip dice
Merge pull request #1344 from cgolubi1/morphing_trip_test

add a regression test for attacks by morphing trip dice
Morph (and doppelganger) now causes the attacker to lose its value, so that the new die will always have a newly rerolled value
Instead of explicitly specifying Power attacks for ambiguous Power/Skill fired attacks, use assert() to check that Power comes first
Merge pull request #1343 from ManvilleFog/138_button_images

reggie rage, ZOEcon, Cowboy Bebop, others not yet in database
Merge pull request #1346 from blackshadowshade/1345_morphing_reroll_on_successful_trip

Morphing trip now reroll after successful attack and morph
Removed unnecessary call by reference
Merge pull request #1337 from blackshadowshade/1334_default_fire

Default attack now handles power/skill choice with fire