[doc] Remove last reference to version 0.6
[doc] Update credits
[tool] Add a tool which helps convert scene from 0.6 to 1.0
[tools] add components exhibit for doc

update hummer photo, with wheels location to:
[(-2.25, -1.0, -0.25), (-2.25, 1.0, -0.25), (1.6, -1.0, -0.25), (1.6,
1.0, -0.25)]
[doc] add quadrotor photos
[doc] Add some warning about changes in builder API
[pocolibs] Only install python files

Previously, it install C files too, and *.so twice if it is build
in-tree.