updated data files for 6.3.0
break apart array production from sort key formation
simpler comment handling
better parsing of allkeys.txt data file format
handle case where level 4 weight isn't there
compile regex
print more during full test for debugging
changed behaviour of Trie.find_prefix to return matched part of key as well as value and remainder
initial attempt at handling non-starters
force NFD normalization rather than assume it
combining character handling
fixed pep8 nit
more tests that were failing in the full test
fixed Trie
more unit testing
updated and completed implicit weighting calc
implicit weighting tests
clarified author roles a little more
display_collation_elements now handles None
added full_test to CI