Builds should always be done using the Gradle wrapper to avoid version
issues, and the deploy task no longer exists (the standard Gradle
assemble task should be used instead).

It does basically the same thing as Gradle's standard build task.

rather than private
this allows to adapt line and pos
in derived lexers so that we do not start
parsing at line 0 and position 0.

Clean up and update build

This Gradle project has no subprojects, so the allprojects block is
unnecessary.

JDK 9 and higher only support targeting Java 6 and higher.

Fix javadoc warnings in patchfiles

# Conflicts:
#	build.gradle