Make Series core, Robot Name side
Make Series core, Robot Name side

Most important updates:
- Promote Series to a core exercise
- Demote Robot Name to side exercise, because there are troubles with the tests, the instructions and what not. 

I like to do a promotion and demotion at the same time, to make it easier to redivide side exercises. 
Side effects:

I had to redivide the side exercises: 
- the ones unlocked by RobotName are now divided over other core exercises 
- Series needed a few side exercises, I stole them from other core exercises on roughly the same level
- And then I had to redivide some others, to balance the number of sides for each core. 
The changes for the side exercises are quite arbitrary, and will change all the time during upcoming changes. 
The changes to the core exercises are for real!
exercism/xruby,NeimadTL/ruby,NeimadTL/ruby,exercism/xruby,NeimadTL/ruby