Removed unnecessary u string prefixes in Sphinx conf.py. Added mocking of lxml in Sphinx to hopefully let readthedocs.org generate program output since it can't/won't build lxml.
Changed reciprocal remove to work with latest pandas. Specified UTF-8 encoding for CSV files and dropping empty rows to work around Windows issues.
Format floats as integers, to accommodate latest pandas (0.13.1).
Merged branch 'master' into variants.
Added test and code that subdirectory creation does not fail when there is more than one corpus text in a subdirectory that is tidied.
Updated stripper tests to incorporate extra text.
Modified TEICorpus to output files per directory, to avoid massive memory use.
Reworked TEI XML tidying to cope with source texts split over multiple subdirectories. Modified stripper to not use lots of memory given new flat directory structure. Added TEI tidying into tacl split command.