Updated target SDK version to 17 (Jelly Bean MR1)
Fixed a crash when an empty page was sent

Empty pages are now treated just like remote rings (though they still
use the pager's activation code, not the normal activation code). Thanks
to the user that reported this crash through Google Play!
Fixed a warning about not specifying a locale for toUpperCase()
Version 0.7.4

This version fixes a crash when an empty page is sent. The target SDK
version was also bumped to 17 (Jelly Bean MR1), although Donut and above
continues to be supported.