Added  more textures

Added SM texture
http://www.cgtextures.com/texview.php?id=113878&PHPSESSID=55ruh4ga5feeglljocv3b8pv05
Added Door Texture

http://www.cgtextures.com/texview.php?id=3342&PHPSESSID=55ruh4ga5feeglljocv3b8pv05
Added vertical adjustment variables

Added Variables for vertical adjustment of floor piece placing
Assigned variables in inspector for floor piece vertical placement