added bar_utils module
a proposal for bar orient configuration
some tidy up and docs regen
got tests to work in node
flip barchart orientation
trans mess
fixed transitions for horizontal bars
minor fixes
updated to latest d3 version
fixed transition problem due to upgrade
change example style
fixed some ambiguous variable naming and added options to bar
renamed functions and minor style change
more variable name changes
towards fixing vertcal implementation
almost fixed vertical implementation
fixed exit problems
generalized inflate scale functions
bar_utils module changed to bar_orient
bar orient tests and minor fixes
testing transition event dispatching
fixed bug on horizontal bars dimentions