*`StreamReader.Read` methods now return errors
The other edits in this commit are related to cleaning up lint errors
caused by the changes to StreamReader
* 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
* adds error handling, returns early from funcs where it makes sense
* fixes build errors
* merge ballresin PR with upstream
* adds error handling, returns early from funcs where it makes sense
* fixes build errors
* merge ballresin PR with upstream
Co-authored-by: dknuth <dknuth0101@gmail.com>
