Added Core Data User Database

The root view, the phylodex, is now populated with data from Core Data
user database. Some dummy data is put into the database if it is empty.
Support for editing--deleting, data entries from the phylodex is
supported.
Merge branch 'feature_coredata' of https://github.com/phylodex/phylo into feature_coredata
just testing
Merge pull request #5 from phylodex/feature_coredata

Feature coredata