Delete mainDB-inventory.csv
Delete 20140522131020_remove_storage_and_hazardous_from_item.rb
Delete 20140522131406_add_hazardous_to_storage.rb
Merge branch  from https://www.github.com/Lambin/fast-meadow-6661 to feature-implement-color-code
chore(refactor): clarifies test instructions and passes them
feature(category): creates constants for categories to make good decisions
feature(Storage): detects storage size and optimizations
chore(refactor): clarifies naming and makes self implicit
feature(Category): creates a new color based on missing colors
bugfix: getting new or existing colors are now scoped by Storage instances
feature(code): Item now has a code field
feature(category): assigns code field to Item
bugfix(storage): corrects implementation of color and code assignment
feature(newitems): adds new items directly to the storage

does not create new categories at the moment
feature(color-code): Storage creates color code by add method
Merge branch feature-implement-color-code to origin/develop