Merge pull request #3 from OpenDTP/dev/ref#25

Dev/ref#25
Fix type checking
Merge pull request #4 from OpenDTP/hot/ref#35

Fix type checking
Merge branch 'master' of github.com:OpenDTP/OpenDTPAPI into preprod
Merge branch 'preprod' of github.com:OpenDTP/OpenDTPAPI into dev/ref#30
Implementing plugin loading