v1.7.0

• nodejs: onRequestSelectDocument method
• nodejs: onRequestSelectSpreadsheet method
• nodejs: onRequestOpen
• nodejs: submitForm
• nodejs: key in referenceData
• nodejs: change reference source
• nodejs: using a repo with a list of formats
• nodejs: delete file without reloading the page
• nodejs: getting history by a separate request
• nodejs: restore from history
• php: using a repo with a list of formats
• php: restore from history
• python: restore from history
• ruby: restore from history
• csharp-mvc: getting history by a separate request
• csharp-mvc: restore from history
• csharp: getting history by a separate request
• csharp: restore from history