Fix incorrect softlink

* Make the travis fails if a script fails

* Update jobs with names

Update sym links

Update contribute_to_paddle.md

Revert "Copy the contribute doc to update for 1.0.0"

Update contribute_to_paddle.md

update models doc path

Copy the contribute doc to update for 1.0.0

update models submodule

create high_low_level_api.md

fix #86

fix path of models' symbolic link

update-api-list-1.0.0