Converted ios-ntp to a proper iOS static library
Recreated ntpA demo application to use the new static library
Updated demo application for ios-ntp static library
Updated demo application for ios-ntp static library
Merge branch 'master' of https://github.com/rivera-ernesto/ios-ntp
armv7s and iOS6 compatibility
Reset existing NTP time offsets after app enters foreground.

Do not trust old data as the system time could have been altered.
Fix server clock validation.

Should not compare the server base time with the iOS system clock.
Merge branch 'master' of https://github.com/rivera-ernesto/ios-ntp