GitLab

* bump to v0.18.1

* fix comments

* Update README & getting_started & changelog & version.py

* resolve comments

* Update the required maximum version of mmcv-full

* Update changelog.md

* Update getting_started.md

* Add highlight in changelog.md

* Update mmdet minimum version

* Update build.yml

* mminstall.txt

* Update mmseg minimum version

* Fix figure links (also to fix pdf compilation)

* Hack pdf doc compilation

* Hack pdf doc compilation

* Set the priority of figure formats when building html, add png format fig to fix pdf compilation

* Merge English and Chinese doc into the same folder

* Add logo image back

* Add logo image back