[Changelog] Marking v2.0.0 alpha 4 release

Author: markfinal

Changelog.txt

@@ -1,3 +1,5 @@
+05-Jul-2019 ======== Version 2.0.0 alpha 4 Release ========
+
 04-Jul-2019 Fixes #563. BAM assembly compilation now uses 'dotnet build' rather than 'dotnet publish --runtime [portableRID]'.
 
 04-Jul-2019 Fixes #564. BAM schema now uses 'xs:anyURI' for the type of the path attribute for package Source.
@@ -54,7 +56,7 @@ Test harness internals have been given an overhaul, so that instances of tests a
 
 01-Jun-2019 Fixes #542. VisualStudio project generation now guards against null reference exceptions when comparing conditions for settings. Mergable VisualStudio settings are now possible, in order to support both system and user include paths in a project.
 
-31-May-2019 Fixes #541. Gcc and Clang now use -isystem and -iquote instead of -I to distinguish between system (angle bracket #include) and non-system (quoted #include) include search paths. Similar, Xcode projects now use SYSTEM_HEADER_SEARCH_PATHS and USER_HEADER_SEARCH_PATHS, and ALWAYS_SEARCH_USER_PATHS.
+31-May-2019 Fixes #541. Gcc and Clang now use -isystem and -iquote instead of -I to distinguish between system (angle bracket #include) and non-system (quoted #include) include search paths. Similarly, Xcode projects now use SYSTEM_HEADER_SEARCH_PATHS and USER_HEADER_SEARCH_PATHS, and ALWAYS_SEARCH_USER_PATHS.
 
 31-May-2019 Fixes #540. C.ProceduralHeaderFile and C.ProceduralHeaderFileFromToolOutput both have a new virtual Boolean property, UseSystemIncludeSearchPaths, defaulting to false. In Modules deriving from these classes, set this to true in order to override the default behaviour and add directories to system includes search paths.