Add a new Shape building API
Split utests and itests and allocate more heap for the latter
Update default mapping
Fix some utests and itests
Change code syntax and class name
Remove useless Osmosis dependencies (already pulled by transitivity)
Fix index mapping issue: _default_ not recognized so specify mapping for each type
Reduce the inserted osm dataset to prevent OutOfMemoryException while running PluginIntegrationITest
Add centroid, length and area fields in indexed nodes and ways