small change in finding gpsStatus.
added confirmation dialog to AfterActivityClass
different pace calculation + main screen reacts on gps lost
No stacking dialogs + activityActivity rects to losing GPS
added arrow in actvty activity. It should sugest the user that he can
click on the displayed data
summary in history. (Shows week and month stats)
small fix
Merge pull request #88 from jskudlarski/master

lost GPS fixed + other small changes