Don't log files as they're extracted from tarball

The `-v` option for tar has been here since the beginning of ruby-build,
but it's not really informative to see a list of files in the log as the
list of files is guaranteed to be the same across machines since we do
checksums.
Print configure options when openssl ext failed to compile

This helps to debug whether `--with-openssl-dir` was used properly.
Indicate ruby-build version number on build failures

This might save us from having to ask people which version they have
installed when they paste us build output from the console.
Prevent "BUILD FAILED" appearing twice on `./configure` error

Since `./configure` executes in a bash subshell, it failing would
execute the ERR trap twice: once in a subshell and once in the main
process. An explicit `return 1` skips one of these ERR traps and fixes
double output.

I hope.

[image of I Have No Idea What I'm Doing dog]
Highlight output that mentions path to full build log

People often miss that and think that the last 10 lines of build output
is the only information they got.
Print OS information on build failure

This is useful info for when someone is pasting build output to our
issue tracker seeking support.
Merge pull request #626 from sstephenson/build-output

Make build output and log more useful