OAK-1804: TarMK compaction

Use SegmentNodeBuilder instead of MemoryNodeBuilder to avoid running out of memory.

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1597854 13f79535-47bb-0310-9956-ffa450edef68
OAK-1804: TarMK compaction

Add the 'compact' mode to oak-run. From the patch by Alex Parvulescu.

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1597860 13f79535-47bb-0310-9956-ffa450edef68
OAK-1858 Segment Explorer
 - refactored package names, class names

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1597865 13f79535-47bb-0310-9956-ffa450edef68