README.md: reword a bit

README.md

@@ -1,14 +1,13 @@
 OVERVIEW
 --------
-This directory contains system pkgsrc collection.  This collection
+This directory contains **system** pkgsrc collection.  This collection
 contains build scripts and files for the packages required for minimal
 Zeppe-Lin installation on real hardware: boot loader, filesystem
 utilities, hw-monitors, servers, and so on.  Packages in this
-collection depends **only** on the core pkgsrc collection.
+collection depends **only** on the **core** pkgsrc collection.
 
 This distribution was originally forked from CRUX ports as of version
-3.6 and rewritten in POSIX sh(1p).  Also, the Zeppe-Lin has its own
-criteria for what packages should be in system collection.
+3.6 and rewritten in POSIX sh(1p).
 
 The original sources can be downloaded from:
 1. https://crux.nu/gitweb/?p=ports/core.git;a=summary