* Add hooks

* change hooks to custom_hooks

* fix a bug in custom_hooks

This reverts commit 17c0f8e3.

* Add hooks

* change hooks to custom_hooks

* Add colab link

* Use mmcv-full in requirements

* Migrate to MMCV 1.0.2

* Resolve path issue

* Use newest MMDet

* Update projects

* Update install process

* Add colab training tutorial

* Update tutorial codes and fix bug

* Clean files, refactor TBD

* Update tutorials

* Remove duplicated code

* Mv tutorial