Added parameter to startMonitoringForRegion for setting notifyEntryStateOnDisplay property, added filtering out of beacons with proximity unknown, fixed nil command bug.
Fixed example app build problem and updated documentation with a note about the problem and the current solution.
Fixed iOS build problem.
Revert "Fixed example app build problem and updated documentation with a note about the problem and the current solution."

This reverts commit 09a211dc0f55b61f9676ae8c217351ed8bea34a5.
Updated build instructions for example app.