Release Name: 0.4.5

Notes:
Tiny graphs.


Changes:
== 0.4.5

* Several fixes by Rob Biedenharn
* lib/sparklines_helper.rb: Include example code for generating "data:" URLs (but leave it commented out due to lack of widespread testing)
* lib/sparklines_helper.rb: allow results to be passed in the options hash (i.e., sparkline_tag(nil, :results => [ ... ], ...))
* lib/sparklines.rb: Move calculation of whisker endpoints out of loop
* lib/sparklines.rb: Fix fencepost bug in whisker that caused plot to be 1 pixel short