Added make install/uninstall. When installing, extra easyXml headers are put in a folder. Thus the production easyXml.h must reference them inside the easyXml/ folder. To avoid having an easyXml folder in the src folder (seems redundant), made dev-easyXml.h to reference header files in same directory. This way development for easyXml can be done without having to install it to /usr/local each time.