Added additional random parameters 

Added random_cat_id and random_post_type parameters to match the functionality of the original Random Redirects plugin.
Added additional random parameters Fixes #867

Made changes as per @enejb's comments.
Uses https for reddit sharing links as appropriate

Made two small changes to the Share_Reddit class to use the
http() method to use the appropriate prefix for the reddit sharing
URLs.
3.1.1 Changelog
Removed unused network.css files
Jetpack_Options: Pass $default to get_option

If non-compressed.
Adding three tests to class.jetpack for sort_modules

The main Jetpack class was very lightly tested, so this
commit adds three tests covering the sort_modules class method,
which is both simple and would cause trouble if unintentionally
changed. I did not include a @since tag as I do not know when the
method was introduced.
Merge pull request #959 from enkrates/add-tests-to-jetpack-class

Adding three tests to class.jetpack for sort_modules
Merge pull request #877 from iannuttall/master

Added additional random parameters
Merge pull request #951 from enkrates/allow-reddit-sharing-to-use-ssl-link

Uses https for reddit sharing links as appropriate
Deleted jetpack.css