64bits support for assembly codes.  

64 bits support for assembly codes.     change list:  
     1.   move processing directory to $(ProjectHome)/Codec/
     2.   Move common assembly files to $(ProjectHome)/Codec/Common/
     3.   64bits assembly support 
     4.   Linux/MAC/VS2008/VS2010/VS2012 makefile update.   

please goto https//github.com/volvet/openh264 for detail commit history.