Function: groupchartable
Section: combinatorics
C-Name: groupchartable
Prototype: G
Help: groupchartable(G): return the character table of G.
Doc: Compute the character table of~$G$,
 Let~$N$ be the number of conjugacy classes of~$G$.
 Return a \typ{VEC}~$[M,\var{e}]$ where $e \geq 1$ is an integer
 and $M$ is a square \typ{MAT} of size~$N$ giving the character table
 of~$G$. See \kbd{galoischartable} for more detail.
