idraw

• refactor: separate @idraw/renderer from @idraw/core

• fix: scroll to the y-end and unlock the wheel event
• refactor: refactor drawing circle
• build: output *.global.min.js

• feat: add operation.disableScale and operation.disableRotate to Element
• refactor: rename dot to controller

• fix: board event in iframes

fix: eliminate interference when other elements are invisible

• feat: add stroke to text-element
• feat: add textShadow and shadow to element-text
• feat: add shadow to element-rect
• feat: add shadow to element-circle
• fixbug: click block area twice to cancel selected-element

fix: click block area twice to cancel selected-element

fix: scale-direction for element when it rotated

• refactor: refactor idraw.exportDataURL
• feat: @idraw/core add free render status
• feat: Add event drawFrame and drawFrameComplete
• feat: @idraw/core add method setOnlyRender and cancelOnlyRender

• fix: fix the scaling state should be adjusted when rotating elements

• feat: Add method getElement and getElementByIndex
• fix: It can listen doubleClickElement when the element is invisible

• feat: add keyboard event for undo
• refactor: refactor @idraw/core lib/*
• refactor: @idraw/core mix element methods
• chore: update text element desc prop
• chore: add demo base on react and vue

• refactor: rename desc.color tp desc.bgColor for rect and circle
• feat: add returns to insertElement methods

• feat: add getSelectedElements to @idraw/core
• feat: add keyboard event to copy/cut/paste elements
• feat: add keyboard event to controll scroll

• feat: add clearOperation and operation attribute
• refactor: resource reload logic
• fix: resource loader logic

• feat: add clearOperation method to idraw for clear all select status https://github.com/idrawjs/idraw/pull/69
• refactor: add attr operation: {[key: string]: any} to Element and replace lock https://github.com/idrawjs/idraw/pull/69
• refactor: add attr extension: {[key: string]: any} to Element https://github.com/idrawjs/idraw/pull/69

• feat: @idraw/board add doubleClick event
• feat: add event named screenDoubleClickElement to @idraw/core
• fix: exportDataURL can't export image completely when idraw scale canvas

• feat: add method named exportDataURL
• feat: set curser default when select locked element
• feat:add attribute named invisible to element data
• feat:add doubleClickElement to idraw
• feat: It wraps text when the text string has \r\n or \n
• fix: it can't transform element'size when it was locked

fix: select-element mode at pointEnd