remove redundant OCaml extensions entry
add erlang, more-complex shell examples

 - some Erlang and escript files
 - .escript extension
 - .erlang extension
 - shell script with %, ##, name tokens
Merge pull request #528 from github/erlang-samples

Erlang samples
more and better samples for Nu, Racket, Scala

 - 99 bottles of beer is more substantial than hello world
 - also fixed chmod 755 on several .script! files
use LINGUIST_DEBUG to debug the Bayesian filter
helpful comments
Merge pull request #529 from github/more-samples

More samples
bump version to include the new sample files