Create package.json

There may be some benefits to having a package.json, but the primary reason i'm interested in submitting this is for the jspm override entry, with it we can include select2 as simply as:

http://jsbin.com/upOtaXIR/2/edit

Any questions please shout!
Correcting git repository url
Spanish l10n improved
Lithuanian l10n improved
Latvian l10n improved
Ukrainian language code from l10n file name has been fixed:
"ua" — is country code for Ukraine.
"uk" — is code for Ukrainian language.
http://en.wikipedia.org/wiki/Ukrainian_language
http://en.wikipedia.org/wiki/Ukraine
Russian l10n improved
Ukrainian l10n improved
Polish l10n improved
Croatian l10n improved
Bulgarian l10n improved
Greek l10n improved
Persian l10n improved
Icelandic l10n improved
Korean l10n improved
L10n files and template l10n file were improved:  Groups of three characters "." (dots) were replaced by a single character "…" (ellipsis).
Removed hardcoded class names from $.fn.select2. The code now uses the exports accessible through window.Select2 to instantiate widgets, allowing the environment to replace or extend those classes globally.
Removed hardcoded class names from $.fn.select2. The code now uses the exports accessible through window.Select2 to instantiate widgets, allowing the environment to replace or extend those classes globally.
Merge pull request #2023 from TheDistantSea/feature/remove-hardcoded-classnames

Remove hardcoded class names from $.fn.select2
Merge pull request #2020 from merkuriy/master

L10n files improved