Fix: Remove unused services
Merge pull request #220 from localheinz/bugfix/unused-service

Fix: Remove unused service factory
Fix: Remove useless .gitmodules
Enhancement: Add CONTRIBUTING.md
Merge pull request #265 from localheinz/feature/contributing

Enhancement: Add CONTRIBUTING.md
Merge pull request #264 from localheinz/fix/remove-useless-file

Fix: Remove useless .gitmodules
Fix: Inject module mapper
Merge pull request #267 from localheinz/fix/inject-module-mapper-into-index-controller

Fix: Inject module mapper into ZfModule\Controller\IndexController
Fix: Inject module mapper
Fix: Inject GitHub client
Fix: Inject module service
Fix: Remove useless methods
Fix: Inject module cache
Fix: Remove unused import