Finished model for wall with door and Created additional files for the shaders

Shader files are for the ones with texture and lighting
Added modularized ceiling model with texture
Added rotate and translate and made a temporary function for creation
Finished Floor Tile model, translate, and rotate
Added walls.js that contains full_wall function
Modularization for wall with window and floor tile
Added stair_step.js

separated brick and metal wall functions
Added stair step texture

textures somehow becomes plain colors
Updated walls.js
Added texture for floor tiles
Added texture to doors
Updated file names for integration
Merged jd_v1.1 and hanz_v1.1
Correct merge for jd_v1.1 and hanz_v1.1
Merge branch 'jd_v1.1' of https://github.com/jdsbanares/cmsc161-leal-jd-hanz into jd_v1.1
added full assigned task
Merged jd_v1.1 and leal_v1.1