Install:
Run `make install' from the ogc directory.

Uninstall:
Run `make uninstall' from the ogc directory.

Linux notes:
ogc is installed in /usr/bin.
You might need to run `sudo make ...' and enter you password.

Windows notes:
You need a cygwin installation with lex/flex, yacc/bison, gcc and the mingw libraries.
Run make xxx in a cygwin bash shell in the ogc directory.
ogc.exe is installed in c:\WINDOWS and cygwin's /usr/bin.
Then you can run ogc from any Windows command-prompt or Cygwin terminal/shell.
