Merge pull request #4 from szprutamich/devel

TD-57 next part
Merge pull request #5 from szprutamich/devel

Serialization of APIDeviceSessionStep fix
Merge pull request #292 from krzysiekbarca/devel

devel to devel-steps
Big step for removing DeviceRun
Merge pull request #294 from szprutamich/devel

Big step for removing DeviceRun
Merge pull request #295 from bitbar/devel-steps

Devel steps