Fix Process.whereis documentation
Make Process.info return nil instead of :undefined
Support removing unicode characters with strip

Thanks for the suggested fix @josevalim
Fix typo in File.rmdir/1
Merge pull request #1589 from rramsden/doc-fix/typo

Fix typo in File.rmdir/1
Merge pull request #1588 from vanstee/string-strip-support-unicode

Support removing unicode characters with strip
Merge pull request #1587 from meh/process-fix

Process fix
Fixed Kernel.defrecord arity in docs
Merge pull request #1590 from jwarwick/record_docs

Fixed Kernel.defrecord arity in docs
Remove sleep in recompile test