add threadsafety.h to bitcoin-qt.pro
add threadsafety.h to bitcoin-qt.pro

- to be able to see threadsafety.h in the Qt Creator IDE the file needs to
  be added to the HEADERS section

joroob/reddcoin,Cannacoin-Project/Cannacoin,joroob/reddcoin,coinkeeper/2015-06-22_19-10_cannacoin,coinkeeper/2015-06-22_18-46_reddcoin,bmp02050/ReddcoinUpdates,coinkeeper/2015-06-22_18-46_reddcoin,joroob/reddcoin,coinkeeper/2015-06-22_19-10_cannacoin,Cannacoin-Project/Cannacoin,coinkeeper/2015-06-22_18-46_reddcoin,reddink/reddcoin,bmp02050/ReddcoinUpdates,reddcoin-project/reddcoin,reddcoin-project/reddcoin,ahmedbodi/poscoin,ahmedbodi/poscoin,reddink/reddcoin,bmp02050/ReddcoinUpdates,Cannacoin-Project/Cannacoin,joroob/reddcoin,reddcoin-project/reddcoin,coinkeeper/2015-06-22_19-10_cannacoin,coinkeeper/2015-06-22_18-46_reddcoin,ahmedbodi/poscoin,reddcoin-project/reddcoin,ahmedbodi/poscoin,coinkeeper/2015-06-22_19-10_cannacoin,reddcoin-project/reddcoin,reddink/reddcoin,coinkeeper/2015-06-22_18-46_reddcoin,joroob/reddcoin,Cannacoin-Project/Cannacoin,Cannacoin-Project/Cannacoin,reddink/reddcoin,coinkeeper/2015-06-22_19-10_cannacoin,bmp02050/ReddcoinUpdates,reddink/reddcoin,ahmedbodi/poscoin,reddcoin-project/reddcoin,bmp02050/ReddcoinUpdates