Simplifying package definition.

And making the system consistent across files.
Leap-year: simpler and consistent package definition.
Grains: simpler and consistent package definition.
Gigasecond: simpler and consistent package definition.
Bob: simpler and consistent package definition.
Bob: simpler and consistent package definition.
Robot-name: simpler and consistent package definition.

Chose not to include stub function definitions because, as the example
file shows, this could be done with classes and accessor methods.
Providing stub functions would drive the student to a particular
solution instead of leaving the solution up to them.
Word-count: simpler and consistent package definition.
Grade-school: simpler and consistent package definition.
Phone-number: simpler and consistent package definition.
ETL: simpler and consistent package definition.
Beer-song: simpler and consistent package definition.
Space-age: simpler and consistent package definition.
Anagram: simpler and consistent package definition.
Nucleotide-count: simpler and consistent package definition.
Meetup: simpler and consistent package definition.
Triangle: simpler and consistent package definition.
Merge pull request #27 from exercism/starting-code

Adding starting code to each exercise.