Model extended to include pdb annotation (species class extended and added 1:N to uniprot and 1:N to structure). ORM mapping. Unit tests working. Tested on web server with SNCA.

hierarchical overlay contain information if there is specific level assigned to it (if not it's considered general)

there are two type of overlay colors:
* user scope (every user account have custom color schema)
* system scope used when user colors are not defined