Using in CLI problems

I'm using Tracy/Nette Debugger in Linux CLI a lot. These PR are not meant to be merged (but if so, I'll be happy), it is more or less notice about problems.

Bad HTML mode detection in CLI (#8).

I'm using `screen` (more command lines in one termial). It changes TERM environment var.

With huge dumps it is necessary to paginate them `| less` or store to file `> out.dump`. In this cases, colors should disappear.