3.0 pre 3 Introducing custom tags

• Completely redesigned system for defining custom tags.
• New --images option to replace the manual copying of images.
• Support for {@img}tag in guides.
• Listing of requires and uses classes on sidebar.
• Listing all source files of a class.
• Listing all types of aliases in class header.
• Support for @evented tag, for documenting evented @accessors.
• Detecting of xtype: property inside Ext.define().
• Allow any text as a default value, for example @param {Object} [scope=this] didn't work before.
• No more throw warnings when Mixed type is used.
• Classes containing classes treated as packages in class tree.
• Guides/videos/examples trees expanded by default.
• New @example preview syntax to start inline example in preview mode.
• Categories file no more needs an extra surrounding {"categories": ... } object.
• Unified formatting of warnings and other log messages.
• Improved handling of windows filenames.
• Lots of bug fixes, as always...