Resolves the following (which I got after liberating letter regexp a bit):

Traceback (most recent call last):
  File "/home/marcink/.virtualenvs/mojedevel/bin/calibre_report_duplicates", line 9, in <module>
    load_entry_point('mekk.calibre==1.3.2', 'console_scripts', 'calibre_report_duplicates')()
  File "/home/marcink/DEV_hg/python/mekk.calibre_utils/src/mekk/calibre/scripts/report_duplicates.py", line 356, in run
    ndp = author_index.get_near_dups(make_simhash(author))
  File "/home/marcink/.virtualenvs/mojedevel/local/lib/python2.7/site-packages/simhash-1.1.2-py2.7.egg/simhash/__init__.py", line 92, in get_near_dups
    sim2, obj_id = r.split(',')
ValueError: too many values to unpack
Additional info about reg in docstring.
Merge pull request #1 from Mekk/master

Bugfix and minor doc update
Update simhash.
Add more test cases.
Add a test case.
Refactor SimhashINdex to support arbitrary bit length.
Update version num.
Remove repeated code.
Add delete method in class SimhashIndex.
Revert "Refactor SimhashIndex to support arbitrary bitlen"

This reverts commit 03dfd7e786866ca6997b20075a2039d4ec82ab1e.
Merge branch 'master' of https://github.com/liangsun/simhash
Move offset and key calculation to Simhash class