AbiWord 2.8.4

# Core

* Editing/Layout (All platforms)
- Fix a bug where deleting a character in non-Western scripts caused a random number of characters to be deleted. (Martin Sevior)

* Editing/Layout (Linux / Mac OSX)
- Bug 6987: "Thai string can't be deleted in proper sequence". This fix applies to all non-Western scripts, for example Russian and Arabic scripts were affected too. This also fixes the cursor movement for complex scripts, as text cluster boundaries are now always honored. (Marc Maurer)
- Bug 11785: Abiword shows strange symbols instead of Arabic characters. This fix applies to all languages that activate our font substitution mechanism. (Marc Maurer)
- Fix the text rendering of complex scripts when text is selected. (Marc Maurer)

#Plugins

*GNOME Office
- Use double click to select a component type and close the dialog. (Jean Bréfort)

#Development

- Maintain and release 2.8.4 (Marc Maurer)
- Link the OpenDocument plugin explicitly against zlib, which fixes the autoconf MinGW build. (Fridrich Strba)