Example tables show failed row in error message. Fixes #79

Here is an example:

```java
example failed

        | value1     | value2     | sum      |
        | <1>        | <2>        | <3>      | ✓
        | <4>        | <5>        | <7>      | ✘     (1)

(1) | <4>        | <5>        | <7>      | ✘
java.lang.AssertionError: 
Expected value1 + value2 => sum but
     value1 + value2 is <9>
     value1 is <4>
     value2 is <5>
     sum is <7>
```
don't create reference descriptions for specs
resolve specs based on EObjectDescription