Added bird and fish(コイキング)
Added comments in case we need it for coding conventions.
Added containable interface...
Add getPets
Merge branch 'development' of https://github.com/teekaykern/csc150-group3-final into development
Applied containable to bird and fish
Merge branch 'development' of https://github.com/teekaykern/csc150-group3-final.git into development
Start XML export
Merge branch 'development' of https://github.com/teekaykern/csc150-group3-final into development
Changed type Date to TheDate
Merge branch 'development' of https://github.com/teekaykern/csc150-group3-final.git into development
XML write static pet
Merge branch 'development' of https://github.com/teekaykern/csc150-group3-final into development
Merge branch 'development' of https://github.com/teekaykern/csc150-group3-final into development