Elements of GL(n,R) should coerce properly to matrices #3400
Description
For example:
sage: M = Matrix(GF(2), [[1,1,1,1]])
sage: G = GL(4,2)
sage: N = G.0
sage: M
[1 1 1 1]
sage: N
[1 1 0 0]
[0 1 0 0]
[0 0 1 0]
[0 0 0 1]
sage: M*N
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
/Users/rlmill/sage-3.0.2/<ipython console> in <module>()
/Users/rlmill/sage-3.0.2/element.pyx in sage.structure.element.Matrix.__mul__ (sage/structure/element.c:11352)()
/Users/rlmill/sage-3.0.2/coerce.pyx in sage.structure.coerce.CoercionModel_cache_maps.bin_op_c (sage/structure/coerce.c:5301)()
TypeError: unsupported operand parent(s) for '*': 'Full MatrixSpace of 1 by 4 dense matrices over Finite Field of size 2' and 'General Linear Group of degree 4 over Finite Field of size 2'
sage: M*N.matrix()
[1 0 1 1]
CC: @aghitza
Component: coercion
Author: Robert Bradshaw
Reviewer: Rob Beezer
Merged: sage-4.3.1.rc1
Issue created by migration from https://trac.sagemath.org/ticket/3400