Preference Fragment Implementation

But this is not working for some reason. So this is only a safe commit.
SettingsActivity working to show Preferences but didn't verify if the values are set correctly.
Share Action Provider not working but the rest of the code is fine.
Commented out ShareActionProvider code to avoid the FATAL Error until it could be fixed.
Share Action Provider Fatal error solved but the share icon doesnt work yet.
For some reason Android Studio keeps messing with preference.xml and string.xml
Fixed the temp unit not changing bug because AndroidStudio buggy refactoring
Detail Activity Temp in Imperial units

Detail activity will now show temp in Imperial
Merge pull request #1 from sudhasukumar/PreferenceFragmentNotWorking

This is with settings Activity working and temp units working and map working but with share action provider not working yet. and there is no action bar in settings activity.