[#84] fix brush rounding issue when bar is centered
start dev work for v1.1
[#85] fix issue #85 by adding safe arc generation function
add travis integration
fix travis build status in readme.md
fix travis build status in readme.md
Merge branch 'master' of github.com:NickQiZhu/dc.js
add wiki link to readme.md
update dependencies version
remove travis status till inconsistency can be addressed on ci server
improve unit test compatibility
improve spec time related compatibility
improve spec time related compatibility
turn on ci status on readme.md
making bar chart working with empty groups
[#90] improve bar/stackable chart's handling of empty groups
[#89] introduce ordinal units
[#89] implement ordinal based rendering in bar chart
[#89] improve ordinal bar chart test cases
[#89] turn off brush if ordinal is on for bar chart