Projects Manager implemented

- general cleanup of CRUD in Projects
- Project Manager now handles repositories creation, editing, archiving
  and delete
Fixed many-to-many relation mapping
Implemented nginx config files creation
Fixed remarks
Merge pull request #46 from ajgon/projects-manager

Projects manager
Merge remote-tracking branch 'upstream/develop' into project-type-validation

Conflicts:
	src/XRM/Projects/BaseBundle/Controller/DefaultController.php
	src/XRM/Projects/BaseBundle/Resources/config/services.yml
Changed project type error notifcation text
Create/edit project form validation (closes #34)

Removed conflicting migration

Validation project name uniqueness
Merge pull request #47 from arekf/form-validation

Form validation
Removed 'Other' project type, minor fixes
Merge pull request #45 from arekf/project-type-validation

Listing projects by type validation (closes #28)