Merge branch 'feature/document_handwriting' into 'develop'
Merge of feature/document_handwriting 添加了html2canvas工具，并修改了mootools中的Array.from以适配es6 to develop
See merge request !115 (merged)
(cherry picked from commit d55aff3a)
Merge of feature/document_handwriting 添加了html2canvas工具，并修改了mootools中的Array.from以适配es6 to develop
See merge request !115 (merged)
(cherry picked from commit d55aff3a)