--theme-style, --theme-variables confusion

if i run `sudo aglio --theme-variables theme/my-colors.less -i input.apib -o test.html` then my new theme colors are present in the html file.

However if I then run `sudo aglio --theme-style theme/my-theme.less -i input.apib -o test.html` then the colors revert to the default theme but my style changes occur.

Am I doing something wrong or should I be merging everything in to one file?

Reproduce the two commands from the issue with input.apib, theme/my-colors.less, and theme/my-theme.less, then trace how --theme-variables and --theme-style are handled. Done means establishing whether the options should compose or whether the expected usage needs to be documented.

Written by the indexing model from the issue text.