#54 Export MARKUSH structure flag

[Nina Jeliazkova]

Export the information whether a given structure is MARKUSH or not into the CSV/SDF file .

This information and statistics on structure type is available via /metadata entry of each dataset, e.g.
https://ambit.uni-plovdiv.bg:8443/ambit2/dataset/1/metadata
(Structure type statistics ) https://ambit.uni-plovdiv.bg:8443/ambit2/dataset/1/query/type_strucs

Search by structure type will give a list of structures with matching type. Could be exportedin any of the supported formats.
https://ambit.uni-plovdiv.bg:8443/ambit2/dataset/1/query/structype?search=MARKUSH&page=0&pagesize=100