Add fromIterator helper for Enumerator

Enumerator.fromIterator is a function that creates a enumerator from an
Iterator.
Change Enumerator.fromIterator to Enumerator.fromTraversableOnce

With respect to the review of @sadache, @julienrf and @mandubian
Avoid using closure, use scoped variable instead.
Don;t specify any logger settings in reference.conf. Move everything to logger.xml so it is easier to override.
Rename fromIterator to enumerate

As @sadache suggested renamed o enumerate. Adding a parameter to the
apply is not without breaking the current API though.
Update framework/src/play/src/main/scala/play/api/libs/MimeTypes.scala

minor bug fix in rdf mime type and addition of turtle mime type http://www.w3.org/TR/turtle/
Merge pull request #657 from guillaumebort/loggerConfig

Don't specify any logger settings in reference.conf.
Merge pull request #633 from bobylito/master

Enumerator.fromIterator
Merge pull request #659 from bblfish/patch-1

Update framework/src/play/src/main/scala/play/api/libs/MimeTypes.scala