added option to enable brush rounding for centered bar chart
updated fluctation and volume charts to always use rounding
cleaned up docs
Add chartOption support
Add composite spec tests
Add series chart test for chartOption method
Lint files
Merge pull request #462
Merge pull request #459
added logger with debug and warn methods
using logger for brush rounding warning
Converted bar chart tests to specs + line chart spec improvements
Merge pull request #466
Merge pull request #467
upgrade d3, crossfilter in web
Merge pull request #464

Conflicts:
	dc.min.js
	dc.min.js.map
create .options to specify options as a config object rather than fluently
fix lint issues
Fix ordinal lineCharts. Closes #470
Added support for hideStack and showStack chaining