Add Text Name Symbol

[abrombo]

It would be useful for LaTeX output if one could associate a text string with each symbol as is done in sympy. Then the text strings could be LaTeX expressions for display of the symbols. In sympy we have -

(ex,ey) = symbols(r'\bs{e}_x \bs{e}_y',real=True)

So using LaTeX we could print - $\boldsymbol{e}_x,\boldsymbol{e}_y$

The names could be accessed with latex(ex) and latex(ey)