comparator v0.1.1

• Add support for comparing sequences, represented as atomic vectors
• Fix bug in DamerauLevenshtein that resulted in incorrect computation of transposition costs
• Rename "Measure" to "Comparator" throughout
• Reclassify MongeElkan and FuzzyTokenSet as token comparators, which operate on lists of token vectors, rather than vectors of (pre-tokenized) strings
• Improve documentation
• First release to CRAN