Separate each section into General and Specific for JVM

[binkley]

Standard structure

Consider putting each page on pipeline portion into a standard structure:

• Why and General
• Specific to JVM (JVM, Gradle and Maven)
• Spots to insert advice for other build tools & language ecosystems
• Going further
• Tips

More than Gradle/Maven

Prepare for the sections being expandable for other build tools/platforms/languages.

Separate each section into General advice, and advice Specific to JVM. Add a Discussion section to break up advice from why and discussion.