This function takes the output of the css.parser and
produces latex style definitions from it.
styler_assistant_latex(x)output from css.parser
a vector of latex style definitions corresponding to (a subset of) the output of the parser
The function create a new latex command for each css declaration, i.e. each item of the list x it is passed.
The assistant currently honours the following css settings: color, text-decoration:underline, font-weight:bold[er] and font-style:italic