Make build output and log more useful

- Print OS and ruby-build version on build failure.
- Highlight path to full log so people can't miss it.
- Print Ruby configure options when openssl extention fails to compile.
- Don't log files as they're extracted from tarballs. It only pollutes the log and is not useful info.

![screen shot 2014-09-06 at 2 38 30 am](https://cloud.githubusercontent.com/assets/887/4174799/b034cbc6-35a9-11e4-9a1d-2b63ff3967d8.png)

![screen shot 2014-09-06 at 2 32 05 am](https://cloud.githubusercontent.com/assets/887/4174798/b033d1a8-35a9-11e4-9349-87ec63b77967.png)