ROM download added

By pressing the '+' you will be taken to Safari upon which when
downloading a zip file you can choose to open in nds4ios and it will
import the file. However, there is no automatic reload so you will have
to switch windows then come back.
Remember settings and apply them to emulation

As of now you can change whether to shift pad from settings and then
you may resume emulation. On screen control is set to on and can't be
changed.
Deletes readme that comes with ROMS

ROM zip files carry a readme.html, upon extraction this now gets
deleted.
Auto refresh when new ROM loaded

The App will auto detect when a new ROM is in the directory, and will
automatically refresh the tableview.
Rollback on UI change that was going to help refresh tableview

Since there was no way to refresh the UITableView I added a refresh
button but it is no longer needed.
Added alphabetical sections and order
Merge pull request #18 from dchavezlive/master

ROM Downloads - thanks dchavezlive