fixed wording

README.md

@@ -1,6 +1,6 @@
 # Package-Centric Source-Based Container Build System
 
-## Why?
+## Reasons
 * There's no standardized way to create container images that include
   applications built from upstream sources.
 * Application dependencies, which typically are libraries, are typically
@@ -8,7 +8,7 @@
   what libraries are installed
 * Ad-Hoc source builds are time consuming
 
-## What for?
+## Goals
 * Fast source builds with lots of packages available
 * Ad-Hoc source builds if required but defaulting to binary repository
 * Reproducible and shareable builds
@@ -18,10 +18,8 @@
 * Integrable with CI
 * Portable
 
-## How?
-
-## Like what?
-* 100% descriptive build spec. Examples:
+## Comparable
+* Descriptive build spec. Examples:
   * https://embedux.github.io/documentation/usage/rootfs/configuration.yml/index.html
   * http://nixos.org/nixos/about.html 
   * https://gitweb.gentoo.org/proj/releng.git/tree/releases/weekly/specs/amd64?id=HEAD