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.

docs/RuntimeAPI/html/globals_defs.html

@@ -108,6 +108,21 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
 <li>hipEventInterprocess
 : <a class="el" href="group__GlobalDefs.html#ga0f01d74059baa704e42aeff8222166bb">hip_runtime_api.h</a>
 </li>
+<li>hipHostMallocDefault
+: <a class="el" href="group__GlobalDefs.html#gad594ec51cb5b5e946c1e354bf80bddc7">hip_runtime_api.h</a>
+</li>
+<li>hipHostRegisterDefault
+: <a class="el" href="group__GlobalDefs.html#gac7c100d241ff84ad10109bb00b7b25dc">hip_runtime_api.h</a>
+</li>
+<li>hipHostRegisterIoMemory
+: <a class="el" href="group__GlobalDefs.html#gaefa79f1b4481d6a1d1091c14b24f33d0">hip_runtime_api.h</a>
+</li>
+<li>hipHostRegisterMapped
+: <a class="el" href="group__GlobalDefs.html#gacfa4edcfcb39fc61bff6bdecb14d7618">hip_runtime_api.h</a>
+</li>
+<li>hipHostRegisterPortable
+: <a class="el" href="group__GlobalDefs.html#ga2db444f2315d412d3c7ba80ec6049583">hip_runtime_api.h</a>
+</li>
 <li>hipStreamDefault
 : <a class="el" href="group__GlobalDefs.html#ga6df5f70eb976836ab3598cacf0ffcdf9">hip_runtime_api.h</a>
 </li>
@@ -124,7 +139,7 @@ var searchBox = new SearchBox("searchBox", "search",false,'Search');
 </div><!-- contents -->
 <!-- start footer part -->
 <hr class="footer"/><address class="footer"><small>
-Generated on Thu Feb 18 2016 20:42:16 for HIP: Heterogenous-computing Interface for Portability by &#160;<a href="http://www.doxygen.org/index.html">
+Generated on Wed Mar 23 2016 23:11:07 for HIP: Heterogenous-computing Interface for Portability by &#160;<a href="http://www.doxygen.org/index.html">
 <img class="footer" src="doxygen.png" alt="doxygen"/>
 </a> 1.8.6
 </small></address>