Remove 'Intermediate' postfix of functions in the Intermediate module
Remove 'Occurrences' postfix of functions in the Occurences module
Rename Occurences module to Occurrences (additional r)
Rename filterDocuments to filter in DocTable module
Rename updateDocuments to map in DocTable module

It is a fake map, since it expects a function (a->a) and not (a->b)
Rename removeById to deleteById and deleteById to differenceById
Cleanup
Add differenceByURI function
Rename modify to adjust and flip the parameter order
Remove ById postfix from functions in the DocTable module
Rename editDocIds to mapKeys
Cleanup
Rename lookupById to lookup
Rename deleteDocsById to deleteDocs, updateDocIds to mapDocIds