More realistic constants and algorithm

Now each pulsar is timed for several times and the schedule of pulsar
observations is independent, which means, that we have more realistic
way of generating the data.

What I could do now is to speed up whilst generalising the data
generating bits into Cython.

Signed-off-by: Ignas Anikevicius (gns_ank) <anikevicius@gmail.com>
Include more papers in the description.

Signed-off-by: Ignas Anikevicius (gns_ank) <anikevicius@gmail.com>
Ignore the generated data file

Signed-off-by: Ignas Anikevicius (gns_ank) <anikevicius@gmail.com>