add the explodingPlayer and thePlayer

just like the explodingEnemy and theEnemy in manager.cpp,
this two pointers are used for exploding.

replaced all the player.xxxx to thePlayer->xxxxx , the code works
fine by present.
code refine
collide step 1
add a life value bar at the top of screen

and can also change player's life value from menu parameter
forget to add the health.cpph files