[API] Get Message by ID #21
Merge pull request #39 from tmilos/I-21

[API] Get Message by ID #21
[API] Delete Message from Queue #22
Merge pull request #40 from tmilos/I-22

[API] Delete Message from Queue #22
[Insight] Symfony2 secret should be changed #28
Merge pull request #42 from tmilos/I-28

[Insight] Symfony2 secret should be changed #28
[API] Release Message back to Queue #23
Merge pull request #41 from tmilos/I-23

[API] Release Message back to Queue #23