v1.4.2, 2013-05-17
+ datetime2.py : replaced hhmm by more general strftimedelta
+ table.py : added read_xls to read Excel files through xlrd library

v1.4.1, 2013-03-26
+ datetime2.py : corrected bug in hhmm
+ piecewise.py : added shift operators
+ optim.py : bug corrected in tsp
+ table.py : added table.remove_lines_where
             same encoding applied to all strings
             bug corrected in groupby

v1.4.0, 2013-01-21
+ piecewise.py piecewise continuous functions
+ colors.py added color_range
+ nvd3.py added multiBarHorizontal
		  div/svg size can now be set correctly
		  more attributes supported
		  uses colors_range for nicer graphics
+ itertools2.py : added ilinear
				  moved arange from math2

v1.3.0, 2012-12-18
+ nvd3.py added to generate JavaScript charts using http://nvd3.org/
          outputs strings to inline in HTML : no fancy JSON or server dependent stuff
+ markup.py now (again) prints page while generated
+ itertools 2 added rand_seq, all_pairs, split

v1.2.0, 2012-11-08
+ optim.py added 
+ math2.py added levenshtein distances for iterables and sets
+ table.py attributes can be passed to table.html + other small changes

v1.1.4, 2012-10-19 -- changes not recorded
v1.1.3, 2012-10-09 -- changes not recorded
v1.1.2 2012-10-04 -- changes not recorded
v1.1.1, 2012-09-27 -- changes not recorded
v1.1.0, 2012-09-27 -- changes not recorded
v1.0.0, 2012-09-21 -- initial release