1.6 House Sparrow

• New Feature 🎉 readonly prop support
• (UX) Improve drag over style (red for invalid/no-op drag, green for valid drag)
• Added upload events #38
• Improved the detection of folders (on Mac OS) - (Thanks to @algm) #41
• Fixed file link for images in list theme #39
• Handling of broken image urls gracefully (in preloaded previews) #37
• Fixed single mode controls issue (that prevented from deleting, renaming and clicking on link)
• Demo URL updated
• Usage of FileData, filesData, etc. deprecated in favor of FileRecord, fileRecords, etc. (See #42)