Compile fixes for windows build to add libxml2

Added libxml2 to win32 configs.
These changes were required to compile on windows with Visual Studio 2010. 
Compiled in 32 and 64 bit. Shared and Static.

In ADApp/pluginSrc/NDFileHDF5.cpp:
-Needed to move NDPluginFile.h above epicsExport.h for shared dll compile
-Windows compiler did not like ivalues[vec.size()]. Changed to be allocated on heap.

In ADApp/pluginSrc/NDFileHDF5Layout.cpp  , ADApp/pluginSrc/NDFileHDF5LayoutXML.cpp:
-Windows compiler did not recognize 'not' , changed to '!'