Items projection/extension, item rep creation with any order of attributes
Writing summary; some minor renamings
Using the same method for projection/extension
Implemented item attributes update
Minor changes for the renames in type-sets lib
Separated projection `as` method; renamed ~ to fields for item and is for attributes
Merge branch 'feature/item-projections'
Merge branch 'master' of https://github.com/ohnosequences/tabula