Create universita-pontificia-salesiana.csl

The dependent styles of universita-pontificia-salesiana-en.csl are not working; they are using the en-US locale (default in the parent), and not their own default locale (that should override the parent's default-locale according to http://citationstyles.org/downloads/specification.html#the-root-element-cs-style and https://forums.zotero.org/discussion/40526/overrule-the-language-of-citation-style/ but it's not happening).
I don't know if this is a bug, but I'm trying another solution: a "general" UPS style, without default-locale, and the dependent styles with their own locale.
I'll change the link in "independent-parent" of the dependent styles later.
Update universita-pontificia-salesiana.csl

Added a note in the summary as requested: https://github.com/citation-style-language/styles/pull/1194#issuecomment-59818256
Merge pull request #1194 from javimat/patch-10

Create universita-pontificia-salesiana.csl