Added new Accent colors
I have added new accent colors according to the following website: http://msdn.microsoft.com/en-us/library/windowsphone/develop/ff402557(v=vs.105).aspx#BKMK_Supportedthemes
Fix Orange.xaml file=>HEX had error
Fix Emerald.xaml=>HEX was the color lime
Set background of MenuItem to the color of the accent.
Merge pull request #681 from xxMUROxx/feature/AccentColors

Added new Accent colors