* add more CI

* fix missing

* remove python-version

* fixed acc

* Fix typo: upsampe_cfg -> upsample_cfg

Signed-off-by: lizz <lizz@sensetime.com>

* convoluton -> convolution

Signed-off-by: lizz <lizz@sensetime.com>

* more

Signed-off-by: lizz <lizz@sensetime.com>

* ok

Signed-off-by: lizz <lizz@sensetime.com>

* fix training bugs

* fix unitest error

* fix error in num_classes==2 case

* delete comments

* dice loss

* format code, add docstring and calculate denominator without valid_mask

* minor change

* restore

* add lovasz loss

* Modify as comments

* Modify paper url

* add unittest and remove Var

* impove unittest

* [Enhancement] Add args check for ignore_index

* Support ignore_index