version 0.5.0
- added qgram counting function 'qgrams'
- faster edge case handling in osa method.
- edge case in lv/osa/dl methods: distance returned length(b) in stead of -1 when length(a) == 0, maxDist < length(b).
- bugfix in lv/osa/dl method: maxDist returned when length(a) > maxDist > 0 (thanks to Daniel Reckhard).
- Hamming distance (method='h') now returns -1 for strings of unequal lengts (used to emit error).
- added longest common substring distance (method='lcs').
- added qgram distance method.
- stringdistmatrix gains cluster argument.

version 0.4.2
- Fix in error message for hamming distance
- Workaround for system-dependent translation of utf8 NA characters

version 0.4.0
- First release
