1.doxgen documentation format for comments in api/*.h 2. comments to wik...

1..Doxygen documentation format for API comments
 	 	  -API/SVC/code_app.h
 	 	  -API/SVC/code_def.h
 	 	  -API/SVC/code_api.h

 2.add automation tool for comments to wiki page
 	 	  -docs/doxygen/.rest----for wiki page layout setting
 	 	  -docs/.py  ---python script written by wilson 
3.code review:
   https://rbcommons.com/s/OpenH264/r/925/

4. for wiki page,please refer to 
   https://github.com/shihuade/openh264/wiki

5.for how to update wiki,please refer to 
   https://github.com/shihuade/openh264/wiki/API2Wiki