Create TYPES for activity tables

[petermr]

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Activity tables have variable numbers of columns and may have parameters (e.g. concentrations). Ideally we should transform to denormalised (e.g tidytables) but that comes later.

Here we try to abstract the different types of tables.

Start by collecting into different activity types, one issue per type. We denote the types here in a single comment and the ne create an issue;

[petermr]

Antioxidant DPPH

Concentration μg/ml	% inhibition by T. bovei essential oil ± SD	% of inhibition by Trolox ± SD
1	38.65 ± 1.08	40.6 ± 0.91
2	47.55 ± 1.34	48.7 ± 1.32
3	52.09 ± 1.05	56.09 ± 0.83
5	64.19 ± 1.32	60.12 ± 1.98
7	64.19 ± 1.83	80.12 ± 1.06
10	69.38 ± 1.33	87.95 ± 1.66
20	76.29 ± 2.12	88.71 ± 1.47
30	81.23 ± 1.43	91.55 ± 2.71
40	92.1 ± 1.65	91.56 ± 1.93
50	95.95 ± 1.40	99.45 ± 2.79
80	97.82 ± 1.87	99.55 ± 1.87
100	98.12 ± 1.58	99.55 ± 2.64

[petermr]

antimicrobial (MIC)

Microorganism	MIC value (mg/ml) for T. bovei essential oil
Escherichia coli (ATCC 25922)	0.5
Pseudomonas aeruginosa (ATCC 27853)	0.25
Staphylococcus aureus (ATCC 25923)	0.25
Staphylococcus aureus (MRSA Positive)	0.5
Candida albicans (Clinical isolate)	0.25