[Change] getTaqData: flexible, now returns only existing ids w/o erroring

Signed-off-by: Oleg Komarov <o.komarov11@imperial.ac.uk>
[Add] sample data: sorts mst and makes master records file

Signed-off-by: Oleg Komarov <o.komarov11@imperial.ac.uk>
[Minor] refactor code for added clarity

Signed-off-by: Oleg Komarov <o.komarov11@imperial.ac.uk>
[Add] beta estimation: refactored into function #02

Signed-off-by: Oleg Komarov <o.komarov11@imperial.ac.uk>