accurate.

improved implementation of exp(), which relies on log().

addition and subtraction operators occurring when exponents were too
different.

is zero.

we can create our own high-precision polynomial approximations.

print() method so that it displays decimal values.

code shortcut, fix bugs in the addition and subtraction, another one in
the multiplication code, and add new unit tests for most of these.

to 32 bigits.

and add a test suite check for unary minus.

multiplication.

names with the project file.

and the OS X port.

to ios-image.cpp, but disable it on OS X because UIKit isn't available.

on errors.

on the autobuilders doesn't support it yet.

mingw64 on mingw32).

add set -e to the build-mingw scripts to catch possible regressions.

and SDL_Mixer are needed and are a lot harder to build.