Change definition of summary/description break

In this commit I have made the following documentation changes:

- Changed short description to summary
- Changed long description to description
- Changed example mail address
- Changed definition when a summary breaks and becomes a description
  to match PSR-5 and actual usage.

See: https://github.com/phpDocumentor/ReflectionDocBlock/issues/34#issuecomment-49510977
If "e.g." is presenting "version number" as the example, then no quotes, but it seems to be the "e.g." could be left off completely:  "such as a version number".

If "e.g" is the first example and "version number" is the second example, then quotes.

Since "e.g." itself could be a true example because of its own dots, I easily see the ambiguity here.