Development reload of non-plugin dependencies

[eirbjo]

Idea:

Extend development plugin to:

• Identify plugin dependencies with Reststop-marked sources
• Load classes from such dependencies from target/classes instead of jar file
• Track changes to source files in these dependencies
• Recompile on source change and redeploy the depending plugin class loader

Also:

• Track changes to jar files of non-marked dependencies (jar file was changed by Reststop-external build)