encryption regulations

[MonicaG]

This page is from the exporting-encryption section of the mobile developers starter kit.

I've made the following changes from that document:

• removed reference to the "over 63 bytes" statement. That requirement has changed.
• Removed the section about requiring export compliance even if the app is only available in Canada. This is because the Apple documentation states that export compliance is only needed if the app is distributed outside of the U.S. or Canada.

[MonicaG]

@kaitlyn-rosenburg - I've updated the page with your suggestions. You can review them here.