Update docs:

- Some comments in hip_hcc.cpp
 - document hipHostRegister* flags.
 - expand docs on hipHostRegister/Unregister. Use "register" rather than
   "pin" to describe action these take.
 - change required CUDA version to 6 (require unified memory)
 - remake doxygen.

hipamd/docs/RuntimeAPI/html/search/all_c.js

@@ -1,4 +1,4 @@
 var searchData=
 [
-  ['one_5fcomponent_5faccess',['ONE_COMPONENT_ACCESS',['../hcc__detail_2hip__vector__types_8h.html#add5d9c0f058c5a52c2b9165a66035d0e',1,'hip_vector_types.h']]]
+  ['name',['name',['../structhipDeviceProp__t.html#a5b44bf8fa46faefcde989942b1d11a5e',1,'hipDeviceProp_t']]]
 ];