Merge pull request #1 from danvk/master

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Merge pull request #2 from witsa/master

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To avoid the rising count of useless resizes : we remove the handler if it exists before re-adding it.
Adding an robustness test before using the registered events member.
Adding test for the per axis option includeZero
Allows that user specifies only one limit of valueRange and let other one to be calculated automatically, by exemple [NaN,30].
Partial auto y range : adding support of null and undefined in addition to NaN
update reference description about the partial auto range.
Revert "To avoid the rising count of useless resizes : we remove the handler if it exists before re-adding it."

This reverts commit 194075ffc1b1c44e37e785aed7dc92e777d7d192.
Merge pull request #3 from danvk/master

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reference sentence rewrite
refactoring of detection of unspecified limit.
remove wrong argument of parseFloat
Changing name of isUnspecifiedLimit function to isNullUndefinedOrNaN
Merge pull request #199 from witsa/master

some robustness and partial auto value range