Add softdelete to wallposts and filter wp list
Some adjustments after Bens review
Remove unnecessary isAuthor permission on reactions list.
Add integration tests for project media wallposts.

Also update drf2 to 2.1.15.
Genrified soft-delete and cleaned up project wallpost api
Smaal adjusts after review Ben
Merge pull request #161 from onepercentclub/project-media-wallposts-api-tests

Add integration tests for project media wallposts.
remove author from __init__
Merge branch 'master' into wallpost-api-permissions
Merge soft_delete and wmall adjustments