A installer script(windows edition only)

Hi,I wrote a windows edition's installer script.
After compile and install pgModeler in windows(all file is copied to build folder),we can use a tool(Inno Setup) to open the pgModeler.iss file,and then compile it.The pgModeler's installer pgModeler.exe would be made.
Windows' users could use the installer pgModeler.exe to install pgModeler easily.