Replace android libtess2 binaries with our own compiled versions
Fix some type-conversion warnings
Fix index buffers being larger than necessary
Add new files to xcode project
Merge branch 'tile-management' of https://github.com/tangram-map/tangram-es into tile-management

Conflicts:
	ios/TangramiOS/TangramiOS.xcodeproj/project.pbxproj