RC-5 for 0.4.10

• Fixed data.region dash line - #989
• Fixed convert json not to mutate input object - #993
• Fixed IE10 issue with getBoundingClientRect - #1057 #1003
• Fixed mouseout event to be skipped when chart is destroyed - #997
• Fixed legend item width when multiple charts rendered - #1011
• Fixed rotated tick text - #1012
• Fixed type handling in load api - #1013
• Fixed to avoid setting c3 class to body - #1014
• Fixed Function.prototype.bind polyfill #1043