build for distribution of 2.1.4

although if you run the same system many times, with the same stardata
and preferences, it will be ~80% faster.

In reality: stardata changes for each system, so don't bother.
But I'll leave the code in there just in case it's useful to you;

for both RLOF and large angular momentum changes.

several new options:

zoomfac_multiplier_increase and zoomfac_multiplier_decrease
tune the zoom in/out system.

all rejection tests are now in one function, evolution_rejection_tests()

The count of zooms has been removed (it's no longer required) and
a load of other code cleaned up. There's also a new rejection_macros.h
which contains the definitions of each type of rejection so they
can be logged.

Also added timestep_macros.h to split the zoomfac stuff off
from binary_c_macros.h

introduces more options (useful for Python API build)

options on the command line