News in 4.99.1, 2020-04-24
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* Build system: port to Meson, remove Autotools.

* API changes:
 - A complete overhaul of the metadata API and implementation. The libxml2 is no
   longer required, and GVfs metadata is no longer used. New API:
	- TeplMetadata and TeplMetadataManager toolkit classes.
	- Convenience functions in the framework, in TeplAbstractFactory,
	  TeplApplication and TeplBuffer.
 - Remove TeplAbstractFactoryVala, because it's possible to manually manage
   GObject references in Vala when using TeplAbstractFactory.

* New API:
 - New class: TeplStatusbar.
 - New class: TeplPanel.
 - New class: TeplStyleSchemeChooserWidget.
 - File loading and saving toolkit: start to add some IO error info bars.
 - TeplInfoBar: add tepl_info_bar_set_buttons_orientation().
 - TeplView: add tepl_view_new_with_buffer().
 - Utility functions: add more functions.

* Misc:
 - Write a new roadmap in docs/.
 - Translation updates.