Is it necessary to be a Christian to be saved? Is it necessary to have a Christian faith to be saved and not go to hell?

Is it possible for a Muslim to go to heaven? 

Or do the bible specifically say that they are all going to hell (Muslims, Jew, Buddhist, Hindu, Non-Believers)?

My question is based on our current teachings (after Christ).
Acts 4:12


  Salvation is found in no one else, for there is no other name under heaven given to mankind by which we must be saved.


Likewise:
John 14:6


  Jesus answered, "I am the way and the truth and the life. No one comes to the Father except through me.


Biblically speaking there is no other way for salvation to occur. Even Jesus asked the Father in Mark 14:36 , if there was any way that he would not have to suffer, to please take that path. There was no other way, and so "For God so loved the world, He gave His only begotten son, that whosoever believes in Him, shall not parish but have everlasting life. For God sent not His son into the world to condemn the world. But that the World may be saved through Him."