import fixes

[LonnekeScheffer]

• bugfix: in adaptive import; nucleotide sequences were not sliced out originally (full sequence was imported), this has been fixed now
• bugfix: N/A values for counts became -9223372036854775808 (because np.nan is a float, and converting it to int results in that number). Now, an ndarray with ints and None for N/A values is returned by get_counts. It was not possible to use np.nan instead of None because then it would convert all other integers in the array to floats.
• chains can be retrieved as Chain enums via Repertoire.get_chains() + in Adaptive import Chains are now properly converted to the right strings -> this resolves issues with the Matches report where with Adaptive import chains weren't recognized properly.
• import tests have been updated to test for correct import of counts and chains

[LonnekeScheffer]

added two small fixes:

• moved matched_regex_params to the correct folder as noted here: https://trello.com/c/ZyP3aC0j/490-matchedregexparams-is-report-default-params-file-but-is-not-under-config-defaults-reports
• removed '...' from print statement showing cache path, as it looks like the trailing dots are a part of the path