* Drag functionality for freehand tool

*  Fixed broken statistical calculation

* Tidied up some styling issues

* Fixed double call to endDrawing on disallowed drag attempt

* Refactored freehand mouseUpCallback

* Refactored freehand mouseDragCallback

* Refactored freehand mouseDragCallBack some more to reduce cognitive complexity

* Addressing code climate issues: reduced complexity of pointInFreehandROI

* Addressing code climate issues: reduced complexity of getSum

* fixed mouseMove re-enabling after mouseUp

* Fixing latest LTS version of nodejs to fix a module dependency

* Persist the scaleOverlayTool default config into displayTool configuration

* Prevents error on crosshairs when image has no imagePlaneModule

* Updates the changelog with the crosshairs fix for #385

* add magnify2 tool

* rename variable

* mobile support

* remove z-index and offset in px

* rename

* Removing MagnifyOld

* Updating NewMagnify to not be dependent on jQuery as we removed it.

* Switch magnifying glass to normal size. Update Package.json with -rc, add unreleased to changelog

Fix the issue that magnify tool displays the previous image when scrolled to the new one while it is in use
- Use IMAGE_RENDERED event instead of NEW_IMAGE event

* Expanded the freehand tool to include statistical calculations as well as some UI/UX improvements to the tool

* Moved freehand tool textBox to data.textBox rather than data.handles.textBox, as it is non-enumerable if you want to save the tool data to JSON

* Refactored how freehand tool creates measurementData

* Fixed mouseHover highlighting being global for all freehand tool instances. It is now local to each instance.

* Refactored mouseHover

* Updating changeog with @JamesAPetts changes

* Improving readability and improving the complexity of the code based on CodeClimate

Chore/get dist out of repo