README.md: update info slightly

The avs-plus domain is synced with gh-pages in this repository, so
it should stay up-to-date as long as changes get committed to that
branch.

Also clarify the docs comment a little.

README.md

@@ -5,12 +5,10 @@ AviSynth+
 features and developer friendliness.
 
 Visit our [forum thread](http://forum.doom9.org/showthread.php?t=168856) for compilation instructions and support.
-The original [homepage of the project](http://avs-plus.net) is not functional at the moment (June, 2018).
-Development branch: https://github.com/AviSynth/AviSynthPlus/tree/master
 
 Building the documentation:
 ---------------------------
-(note, that the bundled documentation was not following the numerous changes in Avisynth+.
+(Note: the bundled documentation lags behind the descriptions found in the wiki.
 You can always check the online documentation at http://avisynth.nl/index.php/Main_Page)
 
 AviSynth+'s documentation can be generated into HTML by using Sphinx.