Support translating equip_flags.txt

Closes #839
Rename quest_loot_requires and quest_loot_not

Closes #838
Rename the power attribute "range" to "target_range"

This should add a little bit of clarity. See the discussion in #745
Merge pull request #843 from dorkster/bugfixes

Support translating equip_flags.txt
Merge pull request #844 from dorkster/quest_loot

Rename quest_loot_requires and quest_loot_not
Merge pull request #845 from dorkster/target_range

Rename the power attribute "range" to "target_range"