Gradle build v1

*NOTE* This branch will be rebased as fixes are applied.

Currently, the full bndtools build-template.xml ant file (and more) is
implemented. No custom ant tasks yet.

Signed-off-by: Ferry Huberts <ferry.huberts@pelagic.nl>
Minor fix: gradle will figure this out for us

Signed-off-by: Ferry Huberts <ferry.huberts@pelagic.nl>
bndoc: disable the bundle phase (the ant build was disabled for bndoc)

Until the dependency on nodejs-less is fixed.

Signed-off-by: Ferry Huberts <ferry.huberts@pelagic.nl>