do the swizzling by using their address rather than their members.

for Win64.

implement automatic promotion in the future.

it can at last be put into a vector.

getter aliases.

switch to C++11.

the magic vector swizzling assignment methods.

such as "foo.xx = bar.xy".

the matrix code itself.

removed because they were used only once.

that x + y != x, and nextafter() which behaves like the C function.

functions are now about 20% faster.

bonus, multiplication or division by a power of two will be optimised as
a shift of the exponent.

missing includes.

add the corresponding unit test.

the game thread.

increase the maximum iteration count to 340.