Updated version number to 0.7.4-SNAPSHOT
Fixed #85: typo in docs mentioning item type 'dot' instead of 'range', and missing type 'rangeoverflow'
dont calculate gravity forces if constant is set to 0
Removed unnecessary zIndex
Merge remote-tracking branch 'origin/develop' into develop
Documented supported browsers.
bugfixes for IE9, style fixes
Merge branch 'develop' of https://github.com/almende/vis into develop
updated history
Released version 0.7.4
Merge branch 'develop'