* suppressing the magic number lint errors in mapgen, it will get a heavy refactor soon, hopefully...
* adding string token constants for SkillClass
* adding panic on error to left/right skill select render
* fixed cuddle lint error
* fixed unnecessary conversion, unused func param lint errors in dcc_animation.go
* adding comment for skill class tokens
* fixed typo in comment
* removed unused parameter in dcc/dc6 animations
* supress warning about Object.setMode always being passed direction value of 0
* fixed all invalid golint directives
* fixed a couple gocritic lint errors
* moved filter constants back to d2enum
* moving key and mouse button enums into d2enum
* moving render type enum into d2enum
* moving input even priority enums into d2enum
* moving terminal enums into d2enum
