Map dimensions & config export fixes

Features

• Introduced map dimensions (mapWidth, mapHeight) in JSON export of floor map and whole configuration

Bug Fixes

• Fixed a problem with exported JSON files of configuration of floor map, which were not current. The map that was currently visible was not saved, because export contains only configuration that was previously saved in admin menu. Now when exporting user is asked if he wants to save config before export, because now config save is always needed before each full configuration JSON export.

Others

• Moved whole source code of demo and library to Github repository instead of private repo
• Temporary whole source code is in demo folder where the DEMO project is located with angular-map-editor library as Angular project (a part of map editor application).