Improve Installation of coala and coala-bears

The project focuses on improving coala's dependency management for installing bear and their dependencies on multiple platforms. Specifically, the core focus is on trying to automate dependency management using Ansible playbooks and roles. Additionally, improving the existing dependency management API by introducing a PlatformRequirement class for system specific package managers and fixing and improving the exiting cib install bears tool which uses the dependency management API by adding complete test coverage.