Improve debug image size warnings

[lumiscosity]

Makes the sizing warning more lenient for battle animations and adds support for big charsets. Also rearranged the Spec struct to fix some unnecessary padding (thanks clang).

[lychees]

It seems that there miss some external tab.

[Ghabry]

Oh right. Thanks for noticing. The indent must be tabs not spaces.

When you have an editor config plugin this should be applied automatically

[lumiscosity]

i use qt creator for c++ development which doesn't have an editor config plugin built in, my bad! i'll correct it tommorow

[lumiscosity]

should be ok now

[Ghabry]

Jenkins: test this please