0.10 2014-05-03

 - Swap end and start time if end < start
 - New options --sort-files: sort input filesj
 - New options --blocksize: specifiy blocksize for random access
 - Optimization: cache date object
 - Added minimal support for compressed files
 - Read from stdin if no files are provided
 - New option --interleave: sort overlapping input files
 - convert dategrep to module
 - improved coverage 

0.01 2014-04-08

 - Initial release
