1) Removed Models entity.
2) CRUD for experiments.
3) Database cleanup.
4) Useless entities removed.
5) Implemented service layer.
6) DAOs - DTOs cleanup.

1) Disabled spring boot framework logs.
2) Added 2 logs at every endpoint, when entering and returning, with useful information.
3) Unified the logs output.

 On branch dev_merge_middleware
 Changes to be committed:
	modified:   build.sh
	modified:   pom.xml
	new file:   src/main/java/eu/hbp/mip/controllers/GalaxyAPI.java
	new file:   src/main/java/eu/hbp/mip/controllers/retrofit/RetroFitGalaxyClients.java
	new file:   src/main/java/eu/hbp/mip/controllers/retrofit/RetrofitClientInstance.java
	new file:   src/main/java/eu/hbp/mip/dto/ErrorResponse.java
	new file:   src/main/java/eu/hbp/mip/dto/GetWorkflowResultsFromGalaxyDtoResponse.java
	new file:   src/main/java/eu/hbp/mip/dto/JwtResponse.java
	new file:   src/main/java/eu/hbp/mip/dto/LoginDto.java
	new file:   src/main/java/eu/hbp/mip/dto/PostWorkflowToGalaxyDtoResponse.java
	new file:   src/main/java/eu/hbp/mip/dto/SignUpDto.java
	new file:   src/main/java/eu/hbp/mip/dto/StringDtoResponse.java
	new file:   src/main/java/eu/hbp/mip/helpers/GenParameters.java
	new file:   src/main/java/eu/hbp/mip/helpers/LogHelper.java