Simplify CSS, rename template

[pyrmont]

Because of course I would do this.

[pyrmont]

So, what you think of this?

[ashmaroli]

I'm waiting for the verdict on the new formatter I proposed.
In current state, removing the borders and padding is not very aesthetically sound when accessing http://localhost:9292/perl?line_numbers=true&theme=monokai&juxtaposed=true

[ashmaroli]

Can the template be named lexer_juxtaposed instead?

[pyrmont]

@ashmaroli Done :)

[ashmaroli]

On using the latest upstream/master branch and testing http://localhost:9292/ruby?line_numbers=true&juxtaposed=true I see the following:

Notice how the tables are squashed into each other..
I think, I should reject this PR and try to reduce CSS in the base branch directly..
whatsay?

[pyrmont]

@ashmaroli Yep, that's cool with me!

[ashmaroli]

Thanks for understanding.