implement calculations+solution
- For now the calculations are done with Ruby cards. Something similar could be done for other languages.
- Most ruby cards will be structure cards created by developers, like sum+*right+*content. So you can do something like "list of numbers+sum" where list of numbers is a search [or a pointer?]
- To make the above work, we created a views called "array" that returns an array of results. So you might get something like [5,6,7,8], and then the ruby card performs the summing.