Add tests for the should function
Reports now recursively count total number of specs for each describe
Fix bug with nested describes consisting of one or no specs
Update the RobberLanguage example

The failure report is now improved.
The implementation bugs are added instead of the correct version.
Omit colon when failure message too long
Only omit colon when description begins with 'Ran '
Refactor spec-reporter, introduce let-in-end expression
Update example failure report