Initial commit
Created Website and Page entities.
Added Mocks in tests. Added PageManager methods
Added meta attributes to Page.
Renamed PageMapper in PageRepository. Added PageStructure class.
Added Users entity and UserManager.
Removed password encryption from UserManager. Improved tests.
Added Menu / MenuItem entities and MenuManager.
Improved PageManager. Added page in MenuManager.
Fixed a bug when editing a page URI.
Added readme, roadmap and travis.yml configuration file.
Updated composer.json and README.md