added extra features#3

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Louisgcr wants to merge 14 commits intospringzfx:masterfrom

Louisgcr:master

Commits on Feb 28, 2019

Commits on Mar 4, 2019

changed camera to create a new camera pointer so that opening a new file would make the camera re-render
louisgcr-NUS
committed

Commits on Apr 24, 2019

changed annotator to remove old file and load from previous pcd
Louisgcr
committed

Commits on Apr 30, 2019

tried removing image ghosting but failed
louisgcr-NUS
committed