Develop (#3)

* Update command added
* Ensure that the upgraded version is really greater
* Update command should not update prerelease
* Minor presentation changes
* Fix command generation in containers from docker-compose file
- Refactored service creation
* Place the full command to the "cmd" package
* Update cobra to v1.4.0
* Updated build and release creation
* Created an install script
* Add more doc
* Add some tests...
* Add a test directive in Makefile

examples/basic/docker-compose.yaml

@@ -4,7 +4,6 @@ services:
 
   webapp:
     image: php:7-apache
-
     environment:
       DB_HOST: database
     ports: