fix instructions

Author: monkstone

docs/_posts/2018-05-11-arch-linux-arm.md

@@ -4,4 +4,4 @@ title:  "Installing JRuby on Archlinux arm"
 date:   2018-05-24 07:34:13
 categories: PiCrate update
 ---
-Probably won't work, please let us know!!!
+Might work, please let us know!!! Manjaro works OK.

docs/_posts/2018-11-18-building-gem.md

@@ -6,9 +6,9 @@ categories: PiCrate update
 ---
 Requirements:-
 
-1. An installed version of vanilla processing to provide `processing.org` customised version of the `jogl` jars. The default `Rakefile` assumes root installation of processing, for debian distros you will need to adjust `processing_root` _ca. line 20_.
+1. Latest jogl-2.4.0-rc jars (place in ~/jogl24 folder).
 
-2. jdk-11+ and maven (builds for jdk-8)
+2. jdk-11+ and maven
 
 Simply clone this distribution, then rake to build and test gem
 ```bash

docs/_posts/2019-11-11-getting_started_buster.md

@@ -46,7 +46,7 @@ jgem install rake
 To install latest picrate and its dependencies:-
 
 ```bash
-jgem install picrate --pre
+jgem install picrate
 ```
 __For a first install:-__