Merge pull request #1 from stilist/master

Use deep copy when merging options
Math.max / Math.min
Merge branch 'master' of git://github.com/wtm/jquery.gantt into use_math_min

* 'master' of git://github.com/wtm/jquery.gantt:
Merge pull request #2 from stilist/use_math_min

Use Math.min / Math.max
port to coffeescript
Merge pull request #3 from stilist/coffeescript_rewrite

Port to CoffeeScript
fix crasher when resetting filters
fix syntax (`of`, not `in`); improve naming
Merge pull request #4 from stilist/fix_filtering

Fix filtering
fix date label rendering
Merge pull request #5 from stilist/fix_date_labels

Fix date label rendering