doc.wikimedia.org: specify additional media-types & set a default

Along with auto-generated Puppet documentation, this site mirrors some Puppet
source code files, which are not declared in the default /etc/mime.types.
This patch adds the correct mime-type for common Puppet code files as well as
.war and .ipa files.

See <http://stackoverflow.com/questions/3728601/what-is-the-correct-mime-type-for-serving-an-iphone-ipa-file>
and <https://groups.google.com/forum/#!topic/comp.lang.java.programmer/oHE1cSm58Zo>

Change-Id: Id346878ee44ea8a0c366c5a615d84d799732e51b