v0.6.0-beta release

• autocomplete in recent notes
• allow duplicated attribute per note (in effect attributes can be multi-valued) #33
• deleting attributes, #34
• attribute sorting
• code mirror in SQL console, #24
• fix image support broken in 0.5.X releases
• create months and days with associated english names, #37
• API for Trilium Sender Android app - https://github.com/zadam/trilium-sender
• token based authentication for the sender API