Implement Radiometry table ASAP

[astronomyk]

The telescope_mirrors_tbl needs to be implemented asap so that we can use the the actually mirror TC files when calling _gen_master_tc(). As it stands at the moment, _gen_master_tc() still relies on SCOPE_NUM_MIRRORS and SCOPE_M1_TC for generating the preset global transmission curves.

Instead of doing this, the _gen_master_tc() should read in the mirrors_telescope.tbl and add the individual transmission curves to the preset curve, e.g. self.tc_mirror etc