This reverts commit 123e409a2e.
This commit breaks several float calculations in subtiles ways. For
example grenates drift to the left. In fact, it's another example why
I'm so hesitant to merge anything that's not a fix for a clearly
reproducable bug. This fixes#99.
This work was submitted by Dmitry Antipov. We stick to macros instead of
inline functions since they're in line with the rest of the code base.
This patch removes several unused functions and tranfers most of the
rest into macros.