* shiny-ui-base(gen_cindex, gen_summ_subset): Adapted. Function
`gen_cindex' now returns less confusing output.

* plotting(get_data_from_key): Argument `outcols' now has a default
NULL value.

Cleaned some more erroneous MS2 spectra (for precid) by removing intensity NAs from cgram_ms1 when using cgram_ms1 for preserving fine results.

test-data-model: New test suite for data-model.R

analyse_extracted_data: Adapted to db inputs. Also fixed sec/mins conversions in a couple of places.