The oss-parent configuration has been applied manually to the root pom.xml,
except that now newer plugin versions are used for source and javadoc JAR
creation, and for GPG signing.
This required some reordering of the plugins for the gson module to make
sure they are executed in the correct order. Otherwise this would cause
failures for javadoc:jar.
Markdown supports automatic list numbering; using this approach makes it easier
to add or remove new items without having to update all the following entries.
* Formatted multi-line and complex commands via multi-line blocks and
line-wrapping for readability and ease of copy-pasting
* Hid URLs behind text links for readability and brevity
* Added missing code formatting, both inline and blocks
