Consistency checks on input data

[hamogu]

For historical reasons, some numbers are defined in multiple places (e.g. because marx used them before there was a CALDB). I think all versions are consistent, so there is no hurry to change anything, but if I ever wanted to it's not clear which of them (or all) need to be changed.

This is issue is about:

• checking consistency to make sure they are actually all the same
• deciding if the current state is OK or if we should load everything from the CALDB now and make away with the marx parameters that encode the same information.

Examples

Grating parameters

dmlist "marx/data/caldb/telD1999-07-23geomN0006.fits[8]" data

ROW    INSTRUMENT GRATING GRATING_ARM PERIOD               ALPHA                GDPSYS        ROWLAND

     1 ACIS    HETG   HEG               2000.810              -5.2050 ASC-GDP-1.1               8632.480
     2 ACIS    HETG   MEG               4001.950               4.7550 ASC-GDP-1.1               8632.480

period, alpha etc, are also defined in marx.par as parameters

Coordinate systems and detector location

> dmlist "marx/data/caldb/telD1999-07-23geomN0006.fits[3]" data  

ROW    CHIP_ID    CHIP           SIZE[2]              LL[3]                                                        LR[3]                                                       UR[3]                                                        UL[3]

     1          0 ACIS-I0                 [1024 1024]               [        2.3610       -26.4830        23.0760]                [        1.130       -26.5450       -1.4560]                     [   -0.10        -2.0130        -1.4560]                [        1.130        -1.9510        23.0760]
     2          1 ACIS-I1                 [1024 1024]                [        1.130        23.0780        -1.4460]                [        2.360        23.0160       23.0860]                [        1.130        -1.5150        23.0860]                     [   -0.10        -1.4530        -1.4460]

is also in marx/data/pixlib/... datafiles. Bot hare taken from the CALDB, so even within the CALDB this information is doubled.